Vaccines are no substitute for general improvements in socioeconomic conditions for the control of infectious diseases. Even with the most advanced medical technology, immunisation by itself is unlikely to compensate for adverse effects of environmental and behavioural factors. It will produce poor and disappointing results unless it is accompanied by control of the source of infection, breaking the chain of transmission and increasing the resistance of the host. It should be developed as part of a programme for improving health care and health education and not in isolation.
KeywordsYellow Fever Immunisation Programme Tropical Environment Measle Vaccine Oral Poliovirus Vaccine
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