In June/July 2022, seroprevalence was >98% in 2553 individuals from the general Swiss population. The proportion of individuals with neutralising antibodies against wildtype, Delta, and Omicron was 94.2%, 90.8%, and 84.9%, and at least 51% of the participants developed hybrid immunity. Individuals with hybrid immunity had, compared to those with only vaccine- or infection-induced immunity, highest levels of both, anti-spike IgG antibodies titres (4518 vs. 4304 vs. 269 WHO U/ml) and neutralisation capacity against wildtype (99.8% vs. 98% vs. 47.5%), Delta (99% vs. 92.2% vs. 38.7%), and Omicron (96.4% vs. 79.5% vs. 47.5%).
Read the final results here.
