by Delthia Ricks, Medical Xpress Neutralizing activity of vaccinee and convalescent serum samples against wild-type SARS-CoV-2 and Delta and Beta variants.Neutralization was measured against (A) wild-type SARS-CoV-2 strain USA-WA01/2020, (B) a Delta (B.1.617.2) isolate, and (C) a Beta (B.1.351) isolate in a microneutralization assay with authentic SARS-CoV-2. For vaccine groups, n = 35, nBNT162b2 = 20, and nHCS = 18. The exception is n3 μg = 34...