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- Live updates: United States reports more than 4,000 Covid-19 deaths on deadliest day of pandemicThe Washington Post
- Pfizer / BioNTech vaccine appears effective against mutation in novel coronavirus variants – studyReuters
- Pfizer study suggests vaccine works against virus variantThe Associated Press
- Pfizer-BioNTech Covid vaccine appears effective against mutation of new strains from UK and South AfricaCNBC
- Singapore Prime Minister Lee Hsien Loong speaks to reporters after receiving COVID 19 vaccineCNA
- View full coverage on Google News
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