- Omicron coronavirus variant partly evades Pfizer vaccine’s protection, study showsCNN
- Omicron vs. T cells: Why scientists are banking on the immune system’s ‘memory’NBC News
- Pfizer: Booster dose of Covid vaccine neutralizes omicron variantCNBC Television
- Wall St inches higher at open after encouraging vaccine updateReuters
- Protection against Omicron coronavirus variant improves with three vaccine doses, Pfizer saysCNN