claim: loss of convalescent serum reduces severity of covid-19 in nonhuman primates
evidence_1: however, and importantly, lower levels of sars-cov-2 in respiratory compartments, reduced gross and histopathological lesion severity in the lungs, and reductions in several parameters associated with coagulation and inflammatory processes were observed in monkeys that received convalescent sera versus untreated controls.", "groups of sars- cov-2-infected animals were treated with pooled convalescent sera containing either high or low to moderate anti-sars-cov-2 neutralizing antibody titers.")