False claims are circulating on social media that the head of Pfizer’s research department revealed their COVID-19 vaccine cause sterilization in females due to its inclusion of a protein called syncytin-1. The protein syncytin-1 is important in the creation of a woman’s placenta. The actual Pfizer and BioNTech vaccine does not contain the protein, nor has the vaccine been associated with infertility. Claims around female sterilization from COVID-19 vaccines have persisted since vaccine trials first began.
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