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Social change accounts for most of the dramatic improvement during the twentieth century in the mortality and morbidity of the common infectious diseases. However, immunization has played its part and the dramatic fall in the level of protection in the under-5-year-olds after the over-publicized scares of the early 1970s has already led to a major recurrence of whooping cough. It is a great relief that poliomyelitis has not followed.
KeywordsInfluenza Vaccine Measle Vaccine Whooping Cough Febrile Convulsion Subacute Sclerosing Panencephalitis
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