'Vast Majority' of Online Anti-Vaxxers Are Women

The "vast majority" of people commenting, sharing and liking anti-vaccination information on Facebook are women, a new study finds. Researchers dug into the world of anti-vaccination people — better known as anti-vaxxers — by looking at data from six of the largest, public anti-vaxxer pages on Facebook. By analyzing two years' worth of data from these pages, the researchers determined that these communities are extremely active, negative in tone and primarily female.

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