LONDON, UNITED KINGDOM - NOVEMBER 30: Two woman wear face masks after the government imposed new restrictions following the discovery of a new highly transmissible Omicron variant of COVID-19, in London, United Kingdom on November 30, 2021. Masks made mandatory in shops and on buses and trains, while new arrivals must take PCR tests. Zuhal Demirci / Anadolu Agency/ABACAPRESS.COM