WASHINGTON, United States (AFP) — Pfizer announced Tuesday it was seeking US authorization for Covid booster shots among adolescents aged 16 and 17, as concerns grow about the impact of the new Omicron variant. The Food and Drug Administration (FDA) has so far only granted emergency use authorizations (EUAs) for boosters to people aged 18 and over, six months after their primary series of the Pfizer or Moderna Covid vaccine, or two months after the […]