A young man receives his Covid-19 vaccination at a vaccination clinic.People receive the Moderna vaccine in Milford, Pennsylvania. (Photo by Preston Ehrler/SOPA Images/LightRocket via Getty Images) A recent study aims to decrease COVID-19 vaccine hesitancy in men after revealing that Pfizer/BioNTech and Moderna vaccines don’t harm sperm count or quality.Scientists at the University of Miami published their findings this month in JAMA.