Claim: The Pfizer vaccine contains syncytin-1 which is vital for the formation of human placenta, so could lead to infertility.
Fact-check: There's no evidence the Pfizer vaccine interferes with the placenta - Full Fact
Verdict: the vaccine contains instructions on how to build a spike protein, a very small part of which resembles syncytin-1. realistically, there is very little chance the vaccine would cause the body to attack syncytin or cause infertility.
Organisation: Full Fact
Author: Grace Rahman
Date published: 2020-12-22T00:00:00