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.
The CEO of Pfizer said that while real-world data is showing protection provided by the company's vaccine goes down over time, it was still extremely high after six months.
The CEO of Moderna, Stephane Bancel, recently said the company may have results on its coronavirus vaccine candidate by November, according to a news report.