Pfizer and Moderna vaccines don’t lower sperm count, study says

Men who received the Pfizer or Moderna COVID-19 vaccine did not see a drop in sperm count or quality, a new study found.

Researchers at the University of Miami studied the sperm quality of 45 healthy volunteers before their first shot and 70 days after their second, and found there were no “significant decreases in any sperm parameter” after taking two doses of the mRNA vaccine. “Because the vaccines contain mRNA and not the live virus, it is unlikely that the vaccine would affect sperm parameters,” said study author Dr. Ranjith Ramasamy, director of male reproductive medicine and surgery at the University of Miami Health System.