Population-Level Relative Effectiveness of the COVID-19 Vaccines and the Contribution of Naturally Acquired Immunity.
Kayoko ShiodaYangping ChenMatthew H CollinsBenjamin A LopmanPublished in: The Journal of infectious diseases (2022)
COVID-19 vaccination was associated with a sustained reduction in mortality at state level during the Alpha, Delta, and Omicron periods. The effect did not vary by naturally acquired immunity.