claim: early high-titer plasma therapy to prevent severe covid-19 in older calves.
evidence_1: convalescent plasma treatment of severe covid-19: a propensity score-matched control study.", "conclusions: early administration of high-titer convalescent plasma against sars-cov-2 to mildly ill infected older adults reduced the progression of covid-19.", "early safety indicators of covid-19 convalescent plasma in 5000 patients.", "effect of convalescent plasma therapy on time to clinical improvement in patients with severe and life-threatening covid-19: a randomized clinical trial.")