Pfizer Inc. will be able to supply the U.S. with 200 million Covid-19 vaccine doses two months sooner than previously expected https://t.co/EvnVHobrgj via @business

— Miss Aja (@brat2381) January 26, 2021

This is very good.

As two new stains of the virus spread globally, Pfizer and BioNTech are also developing booster shots that can protect against various mutations.