A host of European leaders are self-isolating after the French President, Emmanuel Macron, tested positive for Covid-19.
Macron, 42, will self-isolate for seven days while working remotely, the Elysée Palace said in a statement.
The French president attended a number of high-profile events in recent days, including an EU summit.
Following his diagnosis several other European leaders, including the Spanish PM, said they would self-isolate.
"The President of the Republic has been diagnosed positive for Covid-19 today," the Elysée said on Thursday morning. The diagnosis was made following a "test performed at the onset of the first symptoms", the statement added.
The French president's wife Brigitte Macron, who is 67, is self-isolating but has no symptoms.
It is not yet known how Macron caught the virus, but his office said it was identifying any recent close contacts he has had.
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On Tuesday President Macron hosted French parliamentary heads, and on Monday members of the intergovernmental group the OECD.
Last week he, along with almost every other EU leader, attended a summit in Brussels.
Who else needs to isolate?
Among those going into self-isolation are European Council chief Charles Michel, Spanish Prime Minister Pedro Sánchez and OECD Secretary-General Angel Gurría, all of whom met President Macron this week.
Sánchez has tested negative but, like Macron, will work remotely from quarantine.
Portuguese Prime Minister António Costa, 59, has cancelled all official trips, and is isolating and awaiting test results, after a working lunch in Paris with Macron on Wednesday.
Belgian Prime Minister Alexander De Croo and Luxembourg's Prime Minister Xavier Bettel too are self-isolating following contact with the French president.
In a statement Bettel wished Macron a "speedy recovery".
Irish Prime Minister Micheál Martin is limiting his contacts while he awaits the result of a test, a spokesperson said.
French Prime Minister Jean Castex, 55, and parliamentary speaker Richard Ferrand, 58, are also self-isolating, their offices confirmed.
Castex, who is not showing any symptoms and has tested negative, was due to introduce the government's Covid vaccination policy in the Senate on Thursday - now Health Minister Olivier Véran is doing it instead.
France this week ended a six-week national lockdown, replacing the measure with a curfew to help deal with soaring cases.
Macron last week attended a two-day European Council heads of state summit, finishing on Friday.
However, the French president is considered to have become potentially contagious as of Monday evening, a senior EU official told the BBC.
All sanitary measures were observed during last week's meeting and the council has not been informed of any other participants testing positive, the source added.
German Chancellor Angela Merkel wore a mask at the summit and tested negative for the virus on Tuesday, German officials said after hearing the news about Macron.
A French presidential spokeswoman confirmed that all of Macron's forthcoming trips, including a scheduled visit to Lebanon on 22 December, had been cancelled.
Which other world leaders and heads of state have caught Covid?
President Macron is just the latest world leader to test positive for coronavirus:
- On Monday Prime Minister Ambrose Dlamini of Eswatini (formerly Swaziland) died, four weeks after he tested positive
- US President Donald Trump contracted the virus in October. He was given an experimental drugs cocktail and returned to the White House after three nights in hospital
- Polish President Andrzej Duda contracted the virus in October and went into self-isolation
- Algerian President Abdelmadjid Tebboune has spent two months in hospital in Germany after catching the disease in October - last week he appeared in video for the first time since testing positive, saying he hopes to return to Algeria soon
- Guatemalan President Alejandro Giammattei tested positive in September - despite calling himself "high-risk" he did not appear to suffer a severe case
- Jair Bolsonaro of Brazil tested positive in July and spent more than two weeks quarantining in his residence
- In June, the outgoing President of Burundi, Pierre Nkurunziza, died of an illness suspected by many to be Covid-19
- Russia's Prime Minster Mikhail Mishustin contracted the virus in April and was admitted to hospital with moderate to severe symptoms
- UK Prime Minister Boris Johnson tested positive in March - he spent three nights in intensive care in a London hospital, later saying he owed the health workers there his life
- If you have symptoms of the coronavirus, call the NZ Covid-19 Healthline on 0800 358 5453 (+64 9 358 5453 for international SIMs) or call your GP - don't show up at a medical centre
- BBC