Posts claim the pertussis vaccine is unnecessary and dangerous

Several social media and blog posts question if the diphtheria, tetanus, and pertussis (DTaP) vaccine is necessary. The post focuses on pertussis, also called whooping cough, a severe respiratory infection that can cause severe illness and death in infants. One post claims the decline in pertussis deaths is unrelated to the vaccine, while the other falsely claims that the DTaP vaccine contains the mercury-based additive thimerosal.

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