TMPRSS2 and COVID-19: Recent studies are focusing on the search of miRNAs that target main genes related to COVID-19 aggressiveness like ACE2 and TMPRSS2. These analyses suggested that hsa-miR-32-5p and hsa-miR-1246 levels were altered in critical versus asymptomatic individuals [28] and hsa-miR-200 could also affect ACE2/TMPRSS2 expression (29).