TMPRSS2 and COVID-19: With the most recent available data from approximately 32 million COVID-19 positive cases in the United States, we aimed to investigate the link of SARS-CoV2 infection and COVID-19 death to the expression of hormone receptor AR, ACE2 and its activation enzyme transmembrane peptidase serine 2 (TMPRSS2) in multiple matched ages of human tissues in vivo.