The worst whooping cough epidemic in seven decades has hit California this year, with nearly 10,000 cases having been reported by the end of November
Experts are warning that the vaccine currently being used to prevent the disease is partly to blame for the outbreak.
A whooping cough, or pertussis, vaccine was introduced in the 1940s, but only after the mortality rate from the disease had already begun to decline sharply, likely due to better care of infected patients and the natural development of immunity. The vaccine appeared to be effective in reducing the incidence of pertussis, but it also produced significant side effects, including pain and swelling.’
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