However, a recent U.K. community-based population study found that those who have previously been infected with SARS-CoV-2, which causes COVID-19, demonstrate a lower rate of new Omicron BA.4/BA.5 infections compared to those who were vaccinated.
Switzerland has stopped recommending COVID-19 vaccination for spring/summer 2023 due to high vaccination rates and natural immunity from prior infection.
The meta-analysis claims, "The level of protection against re-infection, symptomatic disease, and severe disease appears to be at least as durable, if not more so, than that provided by two-dose vaccination with the mRNA vaccines."
A new preprint by Wilson N. Sy, PhD, Director of the Biotechnology Unit at Investment Analytics Research located in Australia, finds that excess deaths in Australia in 2021 were likely due to vaccination, not COVID-19 mortality.