Convalescent Plasma Antibody Levels and the Risk of Death from Covid-19

In a US retrospective study (n=3082), use of convalescent plasma with higher anti-Covid-19 antibody levels was associated with a lower risk of death within 30 days only among those who had not received mechanical ventilation (RR 0.66; 95% CI 0.48 to 0.91 vs low-titer group).

New England Journal of Medicine