Pfizer says tweaked COVID-19 shots boost omicron protection
Shanghai reports zero COVID cases for first time in months
25 June 2022Abortion pills to become next battleground in US reproductive fight
26 June 2022Pfizer says tweaked COVID-19 shots boost omicron protection
Pfizer announced Saturday that tweaking its COVID-19 vaccine to better target the omicron variant is safe and works—just days before regulators debate whether to offer Americans updated booster shots this fall.
