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Vaccine wars: Social media battle spread of misinformation

SAN FRANCISCO — Like health officials facing outbreaks of disease, internet companies are trying to contain vaccine-related misinformation they have long helped spread. So far, their efforts at quarantine are falling short. Searches of Facebook, Pinterest and Instagram turn up all sorts of bogus warnings about vaccines, including the soundly debunked notions that they cause autism or that mercury preservatives and other substances in them can poison and even kill people. Some experts fear that the online spread of bad information about vaccines is planting or reinforcing fears in parents, and they suspect it is contributing to the comeback in recent years of certain dangerous childhood diseases, including measles, whooping cough an ...
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