J&J's booster shown effective against Covid hospitalization

Two doses of Johnson & Johnson's Covid-19 vaccine provided up to 85 percent protection against hospitalization from the Omicron variant, researchers in South Africa reported on Thursday.

The study from the South African Medical Research Council evaluated a second booster shot in 69,092 health care workers from November 15 to December 20. Researchers observed that effectiveness preventing hospitalization rose from 63 percent to 84 percent within 14 days and then 85 percent one to two months post-boost.

The results mark the first evidence of the effectiveness of such a vaccine...