The chief executive of Moderna has predicted that existing vaccines will be much less effective at tackling Omicron than earlier...
vaccines
Share on PinterestNew research examines the risk of household transmission of the Delta variant, despite vaccination. Christopher Furlong/Getty ImagesThe COVID-19...
Share on PinterestA health worker administers the AstraZeneca COVID-19 vaccine at a mass vaccination center at Holm View Leisure Centre...