Amid Variant Fears, U.K. Discovers Limits to Its Virus Strategy. Politics and Government, Coronavirus Omicron Variant, Masks, Coronavirus Delta Variant, Disease Rates, Coronavirus (2019-nCoV), Vaccination and Immunization, Travel Warnings, Conservative Party (Great Britain), Javid, Sajid (1969- ), Johnson, Boris, Spector, Tim (1958- ), Great Britain