- A 4th dose of Covid-19 vaccine will be needed, Pfizer's CEO says, but the company is working on a shot to handle all variants https://edition.cnn.com/2022/03/13/health/pfizer-vaccine-4th-dose/index.html 1355 comments worldnews
- A 4th dose of Covid-19 vaccine will be needed, Pfizer's CEO says, but the company is working on a shot to handle all variants https://www.cnn.com/2022/03/13/health/pfizer-vaccine-4th-dose/index.html 43 comments worldnews