According to the Centers for Disease Control (CDC),by the end of September 2014,roughly 8,000 cases of whooping cough had been reported in California for that year;more than 250 patients (mostly infants and young children)were hospitalized with 58 of them requiring intensive care.Several other childhood diseases that were once common but then eradicated through high vaccination rates have returned since the antivaccination movement grew in the 1990s.The epidemiological data collected by CDC indicates this resurgence of childhood diseases is most likely the result of

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The resurgence of childhood diseases is most likely the result of reduced herd/community immunity because of the decreased vaccination rates due to the antivaccination movement. When a high percentage of people in a community are vaccinated, it creates herd/community immunity, which means that even those who are not vaccinated are protected because the disease is unable to spread. However, when the vaccination rates drop, the herd/community immunity is weakened, and the disease can then spread more easily, even among those who are vaccinated. Therefore, the CDC suggests that the resurgence of childhood diseases is largely due to reduced herd/community immunity.

According to the Centers for Disease Control (CDC),by the End