Communicating Benefits from Vaccines Beyond Preventing Infectious Diseases


Despite immunisation being one of the greatest medical success stories of the twentieth century, there is a growing lack of confidence in some vaccines. Improving communication about the direct benefits of vaccination as well as its benefits beyond preventing infectious diseases may help regain this lost confidence. A conference was organised at the Fondation Merieux in France to discuss what benefits could be communicated and how innovative digital initiatives can used for communication. During this meeting, a wide range of indirect benefits of vaccination were discussed. For example, influenza vaccination can reduce hospitalisations and deaths in older persons with diabetes by 45% and 38%, respectively, but the link between influenza and complications from underlying chronic non-communicable diseases such as diabetes is frequently underestimated. Vaccination can reduce antimicrobial resistance (AMR), which is growing, by reducing the incidence of infectious disease (though direct and indirect or herd protection), by reducing the number of circulating AMR strains, and by reducing the need for antimicrobial use. Disease morbidity and treatment costs in the elderly population are likely to rise substantially, with the ageing global population. Healthy ageing and life-course vaccination approaches can reduce the burden of vaccine-preventable diseases, such as seasonal influenza and pneumococcal diseases, which place a significant burden on individuals and society, while improving quality of life. Novel disease surveillance systems based on information from Internet search engines, mobile phone apps, social media, cloud-based electronic health records, and crowd-sourced systems, contribute to improved awareness of disease burden. Examples of the role of new techniques and tools to process data generated by multiple sources, such as artificial intelligence, to support vaccination programmes, such as influenza and dengue, were discussed. The conference participants agreed that continual efforts are needed from all stakeholders to ensure effective, transparent communication of the full benefits and risks of vaccination.

FormalPara Key Summary Points
Communication about vaccination benefits often concentrates on direct benefits (disease prevention), but there is a wide range of indirect effects.
Communicating the full benefits of vaccination could help to regain public confidence in vaccines and vaccination.
The meeting participants agreed that continual efforts are needed from all stakeholders to ensure effective, transparent communication of the full benefits and risks of vaccination.


Vaccination is still, by far, the safest and most effective way of preventing infectious diseases, and is acknowledged to be one of the greatest global health achievements, with an estimated 2–3 million deaths averted every year [1]. Over the last two centuries, vaccination has enabled smallpox to be eradicated, and it has reduced global child mortality rates and prevented countless birth defects and lifelong disabilities, such as paralysis from polio [2].

However, the benefits from vaccines and vaccination programmes go beyond preventing infections. There is a growing body of scientific evidence about indirect benefits, but these benefits and their impact are often underestimated and poorly communicated. They include the reduction of the medical and socioeconomic disease burden and the synergy between vaccination and disease prevalence. The protection offered by many vaccines can be extended, through herd protection, to unvaccinated individuals in the community, including those in vulnerable populations who are either too young to be vaccinated, have waning immune systems (i.e., the elderly), or are immunosuppressed due to medical conditions or treatment. Also, vaccination can prevent the negative impact on quality of life that is observed in some individuals who have suffered from a preventable disease. In addition, veterinary vaccines not only improve animal health but they can also have a positive impact on human infections for certain diseases by reducing the use of antimicrobials in food-producing animals, and thus control the development of antibiotic resistance in pathogens, such as Campylobacter, Salmonella, Escherichia coli and Staphylococcus aureus, that can infect humans [3, 4].

Communication on vaccine effectiveness and safety should be proactive, implemented at the early stages of the implementation of vaccination programmes and continued routinely. This communication increase awareness about the overall benefits of vaccines and vaccination programmes, including their indirect benefits as well as their direct benefits. Confidence in vaccines and vaccination programmes has been negatively affected by well-publicised scares about vaccine safety, such as the debunked study linking autism and measles–mumps–rubella (MMR) vaccination [5]. This increasing global and specific vaccine hesitancy needs to be addressed by proactive communication on vaccines and vaccination programmes.

As with any communication, it is important to ensure that the target audience receives and understands the information. New technologies, such as mobile phones, websites and social media could be used to ensure that the communication is accessible. However, it is also necessary to ensure that the information is actually received by the target audience, and that it is understandable, in order to help regain and maintain public trust in vaccination and its benefits.

A two-day meeting was organised by the Fondation Mérieux in December 2017 at their conference centre in Veyrier-du-Lac, France, to discuss these issues and illustrate them through examples [6]. This meeting brought together 44 experts from 12 countries who shared their experiences about the full benefits from vaccination, both direct and indirect, and methods for effective communication about vaccine benefits and how innovative digital initiatives could be effectively used in communication.

A medical writer attended the meeting and prepared an outline of this paper based on the presentations and discussion during the meeting. This was completed and validated by the authors who were consenting members of the Scientific Committee, who then worked with the medical writer to develop the complete paper. The conference presentations and discussions are summarised under four main themes:

  1. 1.

    Indirect benefits of vaccines and vaccination.

  2. 2.

    Improving vaccination uptake to increase benefits from vaccination.

  3. 3.

    Disease surveillance and epidemiological forecasting.

  4. 4.

    Public health communication strategies.

This paper reports the presentations and ensuing discussion during the meeting, and we acknowledge that not all aspects of these themes were covered in the meeting. This article is based on previously conducted studies and does not contain any studies with human participants or animals performed by any of the authors.

Indirect Benefits of Vaccines and Vaccination

The indirect benefits of vaccines and vaccination are numerous and often underestimated. Examples of some of these benefits are summarised in Fig. 1 and Table 1 [7,8,9,10,11,12,13,14,15,16,17,18,19,20].

Fig. 1

Examples of benefits from vaccines and vaccinology

Table 1 Examples of indirect benefits provided by specific vaccines

Conjugate pneumococcal vaccines (PCV) provide a powerful illustration of numerous indirect benefits. Antimicrobial resistance develops naturally over time, usually through genetic changes, but the misuse and overuse of antibiotics have accelerated this process. As the rate of resistance grows, fewer effective antibiotics are available to treat common infectious diseases which can then become untreatable. Since the introduction of the first PCV vaccine containing antigens from seven pneumococcal strains (PCV7), the incidence of penicillin non-susceptible disease, particularly due to vaccine-type strains, has decreased, not only in vaccinated children but also in unvaccinated individuals, particularly the elderly [22]. This is thought to be due to a reduction in nasopharyngeal carriage, and thus the presence of fewer pathogens leading to less severe diseases which resulted in fewer antibiotics being prescribed. One study showed a decrease in antibiotic prescriptions of 18% (95% CI 6; 38) from 2000 to 2010 for children and adolescents, with no change in adults and an increase of 30% in the elderly [23]. Other vaccines, such as diphtheria, pertussis, Hib, meningococcal, influenza, measles and varicella, also have the potential to reduce antibiotic use and the development of antimicrobial resistance [10, 24]. The full benefits of PCV vaccines include a reduction in hospital visits for acute otitis media, reduced incidences of community-acquired pneumonia (CAP), invasive pneumococcal disease (IPD), and pleural effusion, CAP- and IPD-associated hospitalisation in vaccinated and unvaccinated populations [25, 26]. In addition, the incidence of any bacteraemia decreased from > 100/100,000 children aged 3–36 months in 1998 to < 20/100,000 children in 2014 [27].

It is estimated that about 16% of human cancers globally are caused by infectious agents, although data from reliable registries in Africa suggests that 30–50% of cancers could be caused by infectious agents. A number of oncogenic viruses have been identified, and these include human papilloma virus (HPV), hepatitis B and C viruses (HBV, HCV), Epstein–Barr virus (EBV), Human T-Lymphotropic Virus Type 1 (HTLV-1), human herpesvirus-8 (HHV-8) and Merkle cell polyomavirus (MCV) [28, 29]. Cancer is not a primary feature of the disease process and the tumours do not contain replicative virus. However, cancer can occur in chronically infected individuals and, therefore, prevention of the initial infection, which will also prevent chronic infection, will reduce cancer incidence due to oncogenic viruses. Vaccines for HPV have been shown to prevent HPV infections and to reduce the incidence of pre-cancerous lesions. Although vaccines are not currently available for all oncogenic viruses, there is hope that when they do become available and are shown to prevent initial infection, and therefore chronic infection, they will also have an impact on cancer incidence.

Over the past two decades, much progress has been made towards global measles control, as uptake of the first dose of measles-containing vaccine (MCV1) increased worldwide between 2000 and 2017 from 72 to 85%, and measles mortality decreased an estimated 80% (from 545,174 to 109,638) during the same time period [30]. While this reduction in mortality is encouraging, even in a healthy child, infection with measles virus is associated with a short (approximately 1 week) lymphopenia and a more prolonged period of immune suppression [31, 32]. Some studies suggest that there is a loss of immunological memory due to measles virus’ preferential infection of CD150 + memory lymphocytes and their subsequent depletion [31, 33]. A recent study in the Netherlands has confirmed that measles virus infection can reduce pre-existing protective antibodies [34]. The association of measles infection with increased morbidity and mortality due to non-measles infectious disease has been shown in populations of children from wealthy countries, and this increased mortality rate appears to last for 2–3 years after the infection [35, 36].

This potential prolonged immune suppression is particularly important in countries such as the Democratic Republic of the Congo (DRC) where malnutrition, associated with dysfunction of cell-mediated immunity, is widespread and may result in increased measles mortality, relative to wealthy countries [37,38,39]. A study of 2350 children between 9 and 59 months of age in the DRC showed that children with a reported history of measles infection were more likely to have had a fever in the 2 weeks preceding parental interview (OR: 1.80, 95% CI 1.25; 2.60) compared with children who did not have a history of measles [40]. In the same study, receipt of measles vaccination was protective against recent fever (OR: 0.53, 95% CI 0.38; 0.73), and similar work examining children in the DRC suggests that measles may have a long-term negative impact on pre-existing, vaccine-induced immunity to tetanus [41]. These studies suggest that measles vaccination programmes are important in both resource-poor and resource-wealthy countries, not only for the prevention of measles infection but also for the indirect prevention of other infectious diseases.

In Libya, the first vaccination programme was set up in the 1960s, and it has been updated constantly and now covers both children and adults. Vaccination, which is enforced by law, is free of charge to everyone, including those living in war zones and displaced persons, and has promoted equity in the country and reduced poverty [42]. This is considered to be the cornerstone of the healthcare system, and public support is crucial for the success of the vaccination programme. The programme has contributed to reductions in infant morbidity and mortality rates, in congenital disease rates, in sequelae from vaccine-preventable diseases, such as permanent disability, and in rates of diseases related to infection, such as cancer. Although it is expensive, the annual return-on-investment is estimated to be about 12–18%, although the full economic benefits of the improved health of the population continue to be largely underestimated.

Vaccination, as a prevention strategy, should be viewed as part of an age-based approach to health throughout all phases of life [43]. Although many people view vaccination as just a childhood intervention, it is also important for adults and the elderly, the so-called ‘life-course vaccination’ [44]. Vaccination in adults and, in particular, the elderly, goes beyond prevention of infectious diseases. The elderly often have chronic diseases such as diabetes and cardiovascular and renal disease and these conditions can be aggravated by infections, which can require hospitalisation, worsening of chronic diseases and lead to disability and death (Fig. 2) [16,17,18, 45,46,47]. Waiting until adults are ‘old’ before vaccinating can be too late due to immunosenescence, i.e., the ageing of the immune system, leading to poor immune responses [48, 49]. Preventing infections can preserve quality of life in the elderly, and can help prevent catastrophic disability in the elderly population [50].

Fig. 2

Impact of influenza, zoster and pneumococcal diseases on the frailty syndrome in the elderly

Indirect benefits from vaccination can be economic. For example, it has been estimated that, for children born in the US during 1994–2013, vaccination will have prevented 322 million illnesses, 21 million hospitalisations and 732,000 premature deaths, resulting in a saving of $295 billion in direct medical costs and $1.38 trillion in total societal costs [51]. In Finland, it was reported that 195 days of parental work are lost for every 100 influenza-infected children aged < 3 years [52]. A modelling study for 27 European countries estimated that the overall costs averted for influenza with a 44% influenza vaccination coverage in eligible populations was €248 million; if coverage were to be increased to 75%, there would be an additional €190 million averted [53].

Improving Vaccination Uptake to Increase Benefits from Vaccination

Vaccines by themselves do not prevent infections but vaccination does, and thus it is crucial to reach an optimal vaccine coverage rate to achieve the full benefits of vaccination in a population. The reasons for non-vaccination may vary for different individuals and can also be either for specific vaccines or for vaccination in general, leading to refusal of all vaccines [54]. In the context of growing vaccine hesitancy, constantly changing population dynamic, disease epidemiology and communication channels around the world, developing specific, strategic communication is a crucial element of vaccination policies to ensure high vaccine uptake to enable the full benefits of vaccination to be achieved. This communication should be based on public or audience listening through formal research or monitoring Internet and social media, understanding audience profile, interacting and trust-building [55].

The ADVANCE consortium, a European initiative funded by the Innovative Medicines Initiative, was composed of public and private partners, including regulatory agencies, public health institutions, research institutes and vaccine manufacturers. ADVANCE developed recommendations for strategies for the communication of the benefits and risk of marketed vaccines to inform decision-making [56]. The ADVANCE consortium recommend that a comprehensive communication strategy should be developed, using a multi-stakeholder approach, early in any post-marketing vaccine project. They recommend a step-wise approach, with, first, the definition of the goal and objectives of the communication; second, the mapping of stakeholders; third, the development of content and core component such as audience identity, communication channels and message and engagement strategy; and finally, the development of an implementation and monitoring plan. They stress the need for transparency, both for the evidence generation process and the involvement and role of different partners, which is of particular importance when a public–private collaboration is involved [57].

Education of the communication targets and the development of confidence in the source of the information (e.g., vaccine manufacturers, health authorities) are essential for ensuring the effectiveness of the communication. In addition, the communication dissemination route should be adapted to each audience. The vast array of communication tools, ranging from one-to-one conversations with healthcare providers, print media, television and Internet, with the increasing number of social media tools, need to be matched with the information being communicated and the audience being targeted to ensure effective communication.

One example of the importance of communication is the 2014 ‘Fluad crisis’ in Italy [58]. Following the death of three elderly people, two batches of Fluad were recalled and vaccination with Fluad was suspended by the Italian Medicines Agency as a precautionary measure. Following investigation, it was concluded that the batches were not contaminated and the nature of the deaths (cardiovascular) in the elderly people ruled out an infectious cause [59]. However, the disproportionate amount of media coverage given to the decision to suspend vaccination with Fluad, compared with that given to the conclusions of non-association, resulted in a 7% decrease of influenza vaccination uptake in the elderly and reduced vaccine confidence in the general population [58, 60, 61]. This crisis emphasised the importance of having data on background rates for events, such as death, in the populations targeted by the different vaccines in order to be able to distinguish legitimate safety concerns from events that could have a temporal association with vaccination, particularly for mass vaccination programmes [62]. Negative events, in this case, death, create more ‘buzz’ than positives ones; in this case, the non-association of vaccination with the deaths. This crisis is one example of how information is readily disseminated via the press and social media and how quickly reports can become ‘viral’, without having the complete story presented in a balanced manner [63]. Hence, improving communication on vaccines should proactively not only concentrate on safety but should also be accompanied by communication on vaccine benefits, both direct and indirect, with the aim of restoring confidence in vaccination, reducing vaccine hesitancy and improving vaccination uptake.

Disease Surveillance and Epidemiological Forecasting

Disease surveillance and epidemiological forecasting systems are improving with advances in Internet tools. These are important, as they can provide estimates of disease activity and vaccine effectiveness in near-real time. Examples of such systems include HealthMap, which provides content that is aggregated from diverse, freely available information sources covering a broad range of emerging infectious diseases [64, 65]. Another example is Break Dengue, which has been set up by a non-profit organisation to connect different initiatives addressing the issue of dengue around the world, so that together they can have a bigger impact [66]. Break Dengue uses ‘crowd surveillance’ as one of its data sources. Both healthcare professionals and members of the public can report dengue cases via the Break Dengue website. The system does not collect symptoms or propose treatment, it only asks several questions following a decisions tree to understand the context of the visitor, including if the diagnosis has been confirmed by a doctor for a scenario involving reporting cases. At the end of the decision tree, tailored advice is offered to inform the visitor and help reduce the spread of the disease. This crowd surveillance, coupled with data from internet search engines and social media reports of new cases, provides high-quality, close to real-time, disease surveillance [67,68,69]. Although the website does not promote vaccination, it connects interdependent stakeholders, and raises disease awareness and the understanding that vaccination is the solution for prevention. Close to real-time surveillance integrated with stakeholder-specific user interfaces have the potential to connect interdependent stakeholders, such as health authorities, physicians, patients and other stakeholders in the field, and help improve all aspects of immunisation, from prevention and surveillance to vaccination campaigns. It is planned to develop similar systems for other diseases in the future.

In addition, the data collected by this system can be used to feed into quantitative models of epidemiological prediction which can be used to support public health decision-making. In 2014, the American Centers for Disease Control and Prevention (CDC) started the Epidemic Prediction Initiative (EPI) that aims to improve the science and usability of epidemic forecasts by facilitating open forecasting projects with specific public health objectives [70]. Since January 2016, influenza forecasts from participating teams in real time have been published on their website. Although these forecasts have consistently outperformed historical expectations, they are actively developing and testing new models. In Europe, epidemiological data are collected and owned by each country and are generally not publicly available. Surveillance strategies are exploring the combination of digital data through ensemble modelling and further participative approaches with all stakeholders, looking at increasing forecasting performance and actionability of surveillance data. Hence, other approaches for sharing real-time data, particularly vaccine effectiveness and post-marketing safety surveillance, are being explored in projects such as ADVANCE, VAC4EU and DRIVE in Europe [71,72,73].

During the ADVANCE project, the importance of reinforcing credibility of vaccine-related information and building sustainable confidence in vaccines and vaccination for all stakeholders were emphasised [57]. Organisations such as CDC and WHO provide on-line vaccine information services that are accessible by the general public as well as by healthcare professionals [1, 74]. Transparency and independence are crucial characteristics for any information source for ensuring public trust.

Public Health Communication Strategies

The challenges for the delivery and communication of information about vaccines and vaccination to parents and other members of the lay public include having the right information at the right time and providing reliable information to improve the perception of the benefits and safety of vaccines and vaccination. One way of doing this could be to expand the role of the different vaccine providers (e.g. pharmacists/pharmacy assistants, nurses), who will need access to the information that they will communicate, and also training to allow them to deliver the information effectively. One example of this is the use of SMS messages to remind parents and other individuals that their vaccination is due, which was shown to improve the completion of HPV vaccination series [75, 76]. Educational messages that foster vaccine health literacy can also be transmitted via SMS by healthcare professionals.

It has been reported that school settings offer a unique opportunity to reach important target groups with comprehensive health information and to promote positive behaviour change for children and their families [77]. In some settings, the current efforts to promote parental vaccine acceptance are insufficient, as shown by below-target vaccination uptake rates. One solution could be to look at a longer-term strategy in which children, who are the future generations of parents, are taught to be more aware of all the benefits of vaccines and vaccination, and therefore more likely to accept vaccination and be less prone to react negatively to vaccine safety scares. This could be achieved by targeting school children to create an understanding of vaccines and vaccination at an early age and, thereby, encourage them to accept vaccination when they are adults. Ideally, education about vaccines and vaccination could become an integral part of school curricular, in the same way as other health topics, such as preventive behaviours. A game-based module on vaccines, designed to provide experienced-based learning, which is more effective than passive learning with second-hand knowledge, has been developed. In a game, it is possible to convert theoretical knowledge into practical knowledge, i.e. learning by doing. Learning games are ideal for schools because they engage and motivate students, which are the most important factors when learning. Also, games create an environment in which individuals can develop relevant skills and knowledge to enable them to react in an evidence-informed manner and to test their knowledge without fear of failure. Classroom Games is a gamified educational platform, but it is not a computer game, as the students spend most of their time solving tasks in an analogue environment and not on a computer. The WHO European Regional Office is developing and pilot-testing a game-based education module on immunisation and vaccination for school children aged 10–11 years, with the aim of promoting durable positive behavioural changes in children and their families, and building population resilience against vaccine safety scares in Europe.

Discussion and conclusions

The participants at the workshop all agreed that it is important to continue to share experiences about communicating the whole range of vaccine and vaccination benefits to increase their impact and to improve vaccination uptake. How this information is obtained must be clearly and transparently explained to guarantee its credibility. In addition to communicating the benefits of vaccines and vaccination, it is important that information about any safety issues are rapidly communicated to show that all organisations, both public and private, are actively collecting safety data using validated scientific methods. The overall aim of communicating this information is to promote informed decision-making using evidence-based benefit/risk ratios at all levels, including health authorities, with the goal of improving vaccination uptake, and therefore all citizens’ health. This is increasingly important, as we have moved away from childhood vaccination towards the paradigm of life-course vaccination with the aim of not just preventing infantile morbidity and mortality but also promoting healthy ageing.

While communication needs to be transversal, we must ensure that correct and pertinent information is delivered to the target audience in a format that they can readily access, understand, and use at the right time. Advances in communication technologies should be used to facilitate this and to enable timely deliverable of the right information to the right audience. Alert systems, such as SMS, which can be used to remind individuals about their next vaccination, as well as provide information about vaccines and vaccination, can contribute to the timely delivery of information.

Education of all target audiences will be essential to ensure that the communicated information can be correctly used. In addition to educating healthcare professionals about vaccines and vaccination, they must also be trained in communication, as they remain an important source of information for many individuals. Education of the general public could start in schools. Although this requires a long-term investment, it will produce members of the public who are knowledgeable about the importance of vaccines, vaccination, and the full benefits of vaccines, and who will be equipped to respond in an informed manner to vaccine safety scares. We should also educate journalists about the importance of providing balanced reporting of vaccine safety concerns. They need to report not only on vaccine safety scares as they occur but they also need to report the findings from the ensuing investigations so as to provide the full story to the public. The Fluad incident in Italy and the debunked link between MMR vaccination and autism, mentioned earlier, are examples in which reporting on the initial scare far outweighed reporting on the results from the subsequent investigations, which led to loss of public confidence and important reductions in vaccination uptake.

This conference report highlights the wide spectrum of indirect benefits of vaccination beyond the well-known direct benefits in vaccinated populations. It also emphasises the importance of transparent and effective communication strategies and the need to build mutual trust and understanding between all public and private vaccine organisations and the lay public. We need to improve our understanding of the various social behaviours of parents and other individuals that influence decision-making processes for vaccines and vaccination. We also need to improve our understanding of healthcare professionals’ motivation to provide impartial, credible information about vaccination and its full benefits, and to build on this to train them to communicate to, and install an effective dialogue with, parents and other individuals. The conference participants called for continual efforts from all stakeholders to ensure effective, transparent communication of the full benefits and risks of vaccines and vaccination with the aim of improving health for all individuals. To achieve this, all stakeholders, including the lay public, must continue to dialogue and collaborate.


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The authors would like to thank the speakers, in particular Robert Cohen, Michael Johansson, Louise Letley, Siff Malue Nielsen, David Sinclair, Melissa Stockwell, Alberto Tozzi for their input in earlier versions of this paper, and the participants at the meeting for their active involvement in discussions during the meeting. The views and information presented are those of the authors and do not represent the official position of the U.S. Army Medical Center of Excellence, the U.S. Army Training and Doctrine Command, or the Departments of Army, Department of Defense, or U.S. Government.


The meeting was funded by the Fondation Mérieux who received an unrestricted grant from Sanofi Pasture. Funding for the Rapid Service Fees incurred was provided by Sanofi Pasteur.

Medical Writing and Editorial Assistance

Medical writing and editorial assistance for this manuscript was provided by Margaret Haugh, MediCom Consult, Villeurbanne, France, and was funded by Sanofi Pasteur.


All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.


Emma-Pascale Chevalier-Cottin and Nansa Burlet are employed by Sanofi Pasteur. Myint Tin Tin Htar is employed by Pfizer. Hayley Ashbaugh, Nicholas Brooke, Gaetan Gavazzi and Mauricio Santillana declare that they have no conflict of interest.

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Chevalier-Cottin, EP., Ashbaugh, H., Brooke, N. et al. Communicating Benefits from Vaccines Beyond Preventing Infectious Diseases. Infect Dis Ther 9, 467–480 (2020).

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  • Communication
  • Direct benefits
  • Indirect benefits
  • Vaccination
  • Vaccines