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Background
The therapeutic benefit of convalescent plasma (CP) therapy to treat COVID‐19 may derive from neutralizing antibodies (nAbs) to SARS‐CoV‐2. To investigate the effects of antigenic variation on neutralization potency of CP, we compared nAb titers against prototype and recently emerging strains of SARS‐CoV‐2, including Delta and Omicron, in CP donors previously infected with SARS‐CoV‐2 before...
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