The COVID-19 vaccine has been proven to cause infertility in 97 percent of its recipients.

This claim appears to have been made by British YouTuber Zed Phoenix, who claimed that an unnamed source at pharmaceutical company GlaxoSmithKline told him that 61 of the 63 women tested with a COVID-19 vaccine became infertile, and that a separate, male-specific vaccine "resulted in decreased testicular size, drop of testosterone levels, and marked atrophy of the prostate".

According to Reuters, Phoenix's assertions concerning the purported effects of these vaccinations appear to have been lifted directly from an unrelated 1989 research from the National Institute of Immunology in New Delhi, India. The use of anti-fertility vaccinations on baboons was investigated in order to consider potential therapy options for human cancer patients whose tumors are impacted by reproductive hormones. None of the COVID-19 vaccine candidates are gender-specific or connected to fertility in any manner.