Study: Pfizer mRNA Shot Affects Sperm Count, Volume and Concentration

A peer-reviewed Israeli study published in Andrology on Friday has as its title “Covid-19 vaccination BNT162b2 temporarily impairs semen concentration and total motile count among semen donors.”

Despite their semen volume and motility remaining stable, sperm donors in Israel saw a reduction in sperm concentration for three months after injection with synthetic mRNA.

BNT162b2 vaccination included two doses, and vaccination completion was scheduled 7 days after the second dose.

Sperm condition after mRNA injection

The retrospective longitudinal multicenter comparison used 220 samples from three sperm banks.

Authors of the research write in their conclusion: “Long-term prognosis remains good.”

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