TMPRSS2 and COVID-19: High-scoring articles included the enzymes of “Furin” and “TMPRSS2”—whose inhibitor has been proposed as a possible treatment for COVID-19; “C30 Endopeptidase”—a group of enzymes also known as the “SARS coronavirus main proteinase”; and “SHC014-CoV”—a form of coronavirus that affects the Chinese rufous horseshoe bat.