The reason many of the major diseases of childhood,such as measles,whooping cough,and tuberculosis,are now fairly rare in Western industrialized countries is because of

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Widespread immunizations have led to the elimination or reduction of many major diseases of childhood in Western industrialized countries. Immunizations help to provide herd immunity, which means that even those who are not vaccinated are protected because the disease is less likely to spread when a large proportion of the population is vaccinated. Death by accidents, other diseases, or sudden infant death syndrome are not reasons for the reduction of these diseases.

The Reason Many of the Major Diseases of Childhood,such as Measles,whooping