SARS-CoV-2 in the semen: where does it come from?

A recent report by Li et al., described the presence of SARS-CoV-2 in semen samples of six patients, including two subjects who were recovering from the clinical disease. This finding re-opened the discussion on possible male genital tract infection, virus shedding in semen, sexual transmission and safety of fertility treatments during the pandemic period [1]. As stated by the Authors themselves, the small sample size and short follow up dictate caution in the interpretation of their results.