- Mounting evidence highlights the importance of Covid-19 boostersCNN
- Wall Street mixed as Omicron worries cloud vaccine updateReuters
- Pfizer says vaccine booster dose protects against omicron variantYahoo News
- Protection against Omicron coronavirus variant improves with three vaccine doses, Pfizer saysCNN
- Omicron vs. T cells: Why scientists are banking on the immune system’s ‘memory’NBC News