FDA Authorized Second Booster Shot for People 50 and Older
The FDA has authorized a second booster shot of the Pfizer-BioNTech or Moderna Covid-19 vaccine for people 50 and older, if their last booster was more than 40 months ago.
Pfizer-BioNTech’s 2nd Shot Not Effective Against Omicron, But a Third Neutralized It in Lab Tests
Pfizer-BioNTech announced that tests results in a lab shows that the second Covid-19 vaccine loses effectiveness against Omicron, but the third dose of the vaccine neutralized Omicron.