Most Vaccine Combos Yield Higher Omicron Shield Than Just J&J (1)

Nearly all combinations of Covid-19 shots appear to ramp up antibodies to fight off the omicron variant, although researchers found that two doses of Johnson & Johnson’s vaccine offer the least antibody protection.

The two other vaccines available in the U.S., from Pfizer/BioNTech and Moderna, differ from J&J by using genetic material called messenger RNA, or mRNA, to help the body form antibodies against Covid. An mRNA booster after a J&J vaccine or another mRNA vaccine is effective against omicron, a National Institutes of Health study found.

“A third dose after an initial priming series with mRNA definitely ...