Complex debate reflects confidence in overall vaccine efficacy but questions over the need for everyone to get a booster; Third shots less likely to benefit in USA because so many are unvaccinated
FDA Advisors: No boosters for all, not yet
FDA Advisors: No boosters for all, not yet
FDA Advisors: No boosters for all, not yet
Complex debate reflects confidence in overall vaccine efficacy but questions over the need for everyone to get a booster; Third shots less likely to benefit in USA because so many are unvaccinated