Sperm not affected nine months after COVID-19 mRNA vaccination

Coronavirus disease 2019 (COVID-19) vaccines are effective in reducing deaths due to infection with the causative severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Furthermore, widespread vaccination against COVID-19 has successfully reduced infection rates and severe COVID-19 outcomes. SARS-CoV-2 infection has previously been reported to adversely affect male fertility, as demonstrated by a temporary reduction in sperm production. Although current COVID-19 messenger ribonucleic acid (mRNA) vaccines have been associated with minimal or no effect on male fertility, concerns regarding their potential reproductive toxicity remain a major cause of vaccine hesitancy.