Megyn Kelly has mocked NBC Today show s Savannah Guthrie following her hasty departure from co-hosting duties after she tested positive for COVID-19 during their broadcast.
Efficacy of a Fourth Dose of Covid-19 mRNA Vaccine against Omicron nejm.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nejm.org Daily Mail and Mail on Sunday newspapers.
Israeli researchers have found that the number of SARS-CoV-2 antibodies falls in both previously infected and vaccinated people, but the performance of