DC7D32AC-C3DE-4B80-A627-CD9942C6919E

Kaiser did something unusual: It actually sequenced 16,418 positive COVID-19 samples to determine the Omicron subvariant with which the enrollees were infected. What it found was that in 4 of 5 Omicron subvariants, by 150 days (five months) post-shot, efficacy had fallen into negative territory, and Kaiser’s thrice-vaccinated enrollees were more likely to get COVID-19 than the unvaccinated.