According to a new study, the number of cases of whooping co…
According to a new study, the number of cases of whooping cough has steadily increased since 2008 peaking in 2010. The rate of voluntary vaccine withdrawal (not receiving a vaccine shot) for whooping cough increased from 2007 to 2010. Whooping cough vaccine has a known effect on the number of whooping cough infections, and a large majority of individuals were not vaccinated. Which would best explain the relationship between whooping cough infections and vaccine withdrawal?