Leicester's coronavirus infection rate was twice the national average earlier in March.
Italy will move several regions to "red zones" with shops and restaurants closed amid rising coronavirus cases.
Merkel's chief of staff says Germany can return to full normality in the summer if vaccine manufacturers keep to their delivery pledges and no new coronavirus mutation upends vaccination plans.
Only around 30% of French health workers have received a coronavirus vaccine so far. "This is not normal," the government told reporters on Thursday.