Holm Hansen et al.: "Vaccine effectiveness against SARS-CoV-2 infection with the Omicron or Delta variants following a two-dose or booster Pfizer or Moderna vaccination series: A Danish cohort study"
by Paul Alexander
REMINDER: VE is significantly lower for omicron than that against Delta infection & declines rapidly over just a few months; what does this mean? see Figure Delta vs omicron & negative effectiveness
SOURCE:
https://www.medrxiv.org/content/10.1101/2021.12.20.21267966v3
“in particular, we found a VE against the Omicron variant of 55.2% (95% confidence interval (CI): 23.5 to 73.7%) and 36.7% (95% CI: -69.9 to 76.4%) for the BNT162b2 and mRNA-1273 vaccines, respectively, in the first month after primary vaccination. However, the VE is significantly lower than that against Delta infection and declines rapidly over just a few months.”
Enlarged:
