In other developments:
Iran announces another 85 deaths, the country’s highest toll in a 24-hour period, bringing the total number of dead there to 514
Deaths in Spain rise by some 50% to reach 120 and infections jump to 4,200
Canada’s Prime Minister Justin Trudeau begins 14-day self-isolation after his wife Sophie tests positive for coronavirus. He is not showing symptoms
Australia’s Home Affairs Minister Peter Dutton is admitted to hospital after testing positive
European markets recover some ground after heavy losses on Thursday and Asian markets finish down, having rallied after sharp falls on Friday morning
Kenya records its first case of coronavirus, in a 27-year-old woman just returned from the US via London
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Schools in the US states of Ohio, Michigan, Oregon, Maryland, Kentucky and New Mexico have been told to shut on Monday for at least two weeks. The state of Washington has already closed schools in three counties.
And what sporting events are off?
The next matches of Europe’s Champions League and Europa League have been postponed, as well as the draws for the following rounds.
Several clubs in the premiership have been hit. Chelsea football club went into lockdown after player Callum Hudson-Odoi tested positive. All Chelsea personnel who have been in contact with him, including the entire senior men’s team, will have to self-isolate for 14 days.
Arsenal manager Mikel Arteta tested positive. Leicester and Manchester City also have players in self-isolation.
In golf, the Masters has been postponed. And in rugby, Saturday’s Six Nations match between Wales and Scoland is off.
The NHL, NBA and MLS have all suspended their seasons in North America, and the ATP tour shut down for six weeks “to protect the health and safety of our players, staff, the wider tennis community and general public health”.
This weekend’s Formula One season-opening Australian Grand Prix has been called off.
Media captionBoris Johnson: “More families will lose loved ones before their time”
Ski areas in western Austria’s Tyrol province are also to close down from Sunday, regional officials said Thursday.
: How the virus has impacted sporting events around the world
What is the latest on lockdowns and quarantines?
The Czech Republic has said that from Monday it will ban all foreigners without temporary or permanent residency from entering the country and all Czech citizens from leaving. This follows similar measures by neighbouring Slovakia.
Malta has announced mandatory 14-day quarantines for everyone entering the country.
Belgium is the latest country to impose a blanket ban on restaurants, cafes and nightclubs, although chip shops will be allowed to remain open.
On Thursday, Italy‘s government imposed the closure of restaurants, bars and almost all shops except food stores and pharmacies. The death toll there has passed 1,000 but Foreign Minister Luigi Di Maio says the measures imposed in the first area of the outbreak have been proving effective.
Media captionItalian Foreign Minister Luigi Di Maio: “There is a way to defeat this virus”
A number of key figures have also revealed they are self-isolating amid concerns they may have caught the virus.
How is the cultural sector being affected?
The Van Gogh museum and the Rijksmuseum in Amsterdam are closing until the end of March In the US, New York‘s Metropolitan Museum of Art, the largest art museum in the world, said it was temporarily closing all three of its locations in the city. All Smithsonian museums in Washington DC and New York City will close from Saturday
Belgium has announced a raft of restrictions, cancelling all cultural and recreational events from Friday night but stopping short of a lockdown
In the world of film, Disney’s Mulan became the latest major film release to be delayed, and the release of the latest Fast and Furious instalment was pushed back by 11 months. The Tribeca Film Festival was postponed in the US.