An increasing number of doctors in the U.K. warned that the country faces a renewed health crisis due to rampant Covid-19 infections and a rising number of hospitalizations and deaths. The warnings from several big British medical bodies over the last couple of days come as government officials have insisted that more restrictions on public life are not yet necessary. The U.K.’s vaccination program, which got off to a flying start, has stalled with 79% of the population over age 12 fully vaccinated. Adherence to protective measures like mask-wearing has declined; the favorable summer season is fading, and a new sub-lineage of the Delta variant, known as AY.4.2, is increasing. The result is a rate of infections, hospitalizations, and deaths unheard of in similar European nations. For example, compared to France, the U.K. has more than ten times the number of cases and almost four times as many deaths per million. With a current rate of over 80,000 new cases a day, medical experts call for the U.K. to act now to prevent the situation from escalating out of control ahead of winter.