According to Johnson and Johnson their covid booster shot protects people against severe illness from the Omicron variant.
A study from South Africa shows vaccine effectiveness rose 84% two to four weeks after a booster shot.
& A study from the US Shows people who got two doses of Pfizer’s vaccine followed by the J&J booster had a 41 fold increase in neutralizing antibodies
And a 5 fold increase in the cells that protect against severe disease.
