ACE2 and Infertility: It is worth noting that single-cell RNA-sequencing data of adult human testis indicates that the mRNA expression of ACE2 was expressed in both germ cells and somatic cells and that the positive rate of ACE2 in the testes of infertile men was higher than normal, which cautions that SARS-CoV-2 may cause reproductive disorders through a pathway activated by ACE2 and that men with reproductive disorder may easily be infected with SARS-CoV-2 (Shen et al., 2020).