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. 2020 Sep 8;73(3):e550–e558. doi: 10.1093/cid/ciaa1345

Table 2.

Summary of Anti-spike Antibody Titers and Neutralizing Titers in Pooled Sera for Therapy

Groups OD ratio Anti-S titer PRNT50
Negative control 0.029 - -
Moderate titer sera 1.946 4096 1081
High titer sera 4.997 32 786 7046

Abbreviation: OD, optical density.