Claims that individuals who have received COVID-19 vaccines then “shed” mRNA or spike proteins are circulating widely on social media. Anti-vaccine organizations and other groups that embrace conspiracy theories and pseudoscience are asserting that this “shedding” puts unvaccinated individuals at risk of harm. One of several debunked claims includes the belief that an unvaccinated woman’s menstrual cycle can be altered simply by their being in proximity to a vaccinated individual. In reality, those vaccinated with a COVID-19 vaccine cannot and do not shed mRNA or spike proteins, or any other elements associated with these vaccines.
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The Public Health Communications Collaborative (PHCC) was formed in 2020 to coordinate and amplify public health messaging on COVID-19 and increase Americans’ confidence in guidance from the Centers for Disease Control and Prevention (CDC) and state and local public health officials.
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