Denmark's prime minister announced special restrictions for more than 280,000 people in the northwest of the country on Thursday after a mutated version of the new coronavirus linked to mink farms was found in humans.

Copenhagen warned that the mutation could threaten the effectiveness of any future vaccine.

The World Health Organization (WHO) in Europe on Thursday said it was seeing an "explosion" of coronavirus cases in the region and warned of a "tough time" ahead as mortality rates rose.

Delaying cancer treatment by just a month can put patients at a sharply greater risk of dying, according to research published Wednesday, the latest to sound the alarm over the coronavirus pandemic's impact on other health conditions.

Dubai ruler Sheikh Mohammed bin Rashid Al-Maktoum said Tuesday he had received an experimental coronavirus vaccine, becoming the latest United Arab Emirates official to take part in the trials.

British Prime Minister Boris Johnson on Monday defended his belated decision to impose a second coronavirus lockdown as critics claimed he could have saved "thousands" of lives by acting sooner.

The WHO chief began a first day in quarantine Monday after coming in contact with someone with Covid-19, but does not need to be tested for now, the organization said.

More than 1.2 million people have died of coronavirus around the globe, according to an AFP tally from official sources at 0745 GMT on Monday.

Prince William, second-in-line to the British throne, contracted coronavirus in April but kept his diagnosis secret, media reported on Monday.

Germany on Monday led a further tightening of coronavirus restrictions in Europe that have triggered anger and frustration across the continent, while the Covid-19 crisis in the United States deepened.

Greek Prime Minister Kyriakos Mitsotakis on Saturday declared a one-month partial coronavirus lockdown, shutting down restaurants and other leisure activities in Athens and other major cities from Tuesday.