PROS1 and infection: Batra et al (2020) trained an RF model to predict inhibitors of the isolated viral spike (S-protein) protein of SARS-CoV-2, and at the interface of the viral (S-protein)-human Angiotensin-converting enzyme 2 (ACE2) receptor to limit or inhibit the virus binding to the human receptor, thus debilitating the infection based on the drug-target binding affinity.