By BY CARL ZIMMER AND SHARON LAFRANIERE from NYT Health https://ift.tt/3iZpVX4
Pfizer-BioNTech’s vaccine gets slightly weaker over time, company data shows, but remains strong in preventing severe disease.
By BY CARL ZIMMER AND SHARON LAFRANIERE from NYT Health https://ift.tt/3iZpVX4
Post a Comment Blogger Facebook
Thanks for commenting. I hope you will do again.