Method: Human plasma samples were assayed for neutralization activity against lentiviruses pseudotyped with SARS-CoV-2
spike containing a 21-amino acid cytoplasmic tail deletion and either
D614G or mutations corresponding to lineage B.1.526 (v.1:
L5F,
T95I,
D253G,
E484K,
D614G, and
A701V; v.