The new variant of the coronavirus detected in the United Kingdom may have already infected citizens of several European countries, said the professor of pharmaceutical-epidemiology at the University of Oxford Daniel Prieto-Alhambra today. About 20 million people are now confined in London and its metropolitan area, due to the increase in infections with covid-19, apparently due to the mutation that makes the virus more contagious, a situation that the United Kingdom has already communicated to the World Health Organization (WHO).