Avidity indices (AI) were calculated as the percent of antibody that remained bound following NaSCN elution, using an interpolation optical density (OD) value of 0.5 Units (Interpolation valueNaSCN/ Interpolation TSHR valuePBS/FCS) 100. produced strong opsonophagocytic activity against 4 of 8 serotypes and 30% produced high avidity serotype-specific IgG antibodies to 10 of 23 serotypes at […]