Effectiveness of Vaccinations

Vaccinations have been credited with helping to reduce the risk of illness and disease. But the question that never seems to be answered is how well do these vaccines work. An article published by the United States Department of Health and Human Services answers this question for several common illnesses that have vaccinations.

The first of the illnesses that they present is that of Influenza type B. Their study shows that sens 1991 the number of cases has dropped 98.62%. Influenza is not the only sickness that has had drastic decline in cases because of vaccination. Sense the 1960's measles, mumps, and rubella cases have all decreased by over 99%. Pertussis has decreased over 97% sense the 1920's and Polio has been irradiated in the United States because of vaccinations.