ACE2 and COVID-19: We found that six of those volunteers had ACE2-like antibody-associated catalytic activity in their plasma, and that the presence of ACE2-like antibody-associated catalytic activity correlated with lower blood pressure after a 6-minute walk test, indicating that ACE2-like abzyme activity occurs in people with both acute COVID-19 and people convalescing from COVID-19 and can have associations with physiologic consequences.