PROS1 and chronic pancreatitis: Hydrolysis of the SARS-CoV-2 S protein (S2’) by TMPRSS2 can be decisively blocked by Camostat mesylate (Camostat), which is a clinically proven trypsin-like serine protease inhibitor and previously used for the treatment of chronic pancreatitis (Ohshio et al., 1989; McKee et al., 2020) (Figure 4).