Second COVID-19 booster is now recommended: Ho Chi Minh City health director
Ho Chi Minh City started giving out fourth doses of COVID-19 vaccines last month
Fourth COVID-19 vaccine dose boosts antibodies five-fold in Israeli study, PM says
A fourth dose of COVID-19 vaccine boosts antibodies five-fold a week after the shot is administered, Israeli Prime Minister Naftali Bennett said on Tuesday, citing preliminary findings of an Israeli study