Infection, Hospitalization Gap Narrows Between Unvaccinated and Vaccinated: Study

A doctor checks on a COVID-19 patient in a hospital in Los Angeles County, Calif., in a file photograph. Apu Gomes/AFP via Getty Images

The protection from vaccines against the virus that causes COVID-19 dropped following the emergence of the Omicron virus variant, but held up better against hospitalization, according to a new study.

While the Delta variant was still dominant in the United States, COVID-19 cases and hospitalizations among unvaccinated people were 3.8 times and 12.9 times, respectively, those among vaccinated people without a booster, researchers in California found.