Luxembourg's Prime Minister Xavier Bettel is in “serious but stable” condition with Covid-19 and will stay in hospital for two to four more days, according to the government statement.

AFP cites its sources as saying that Bettel “is short of breath, but not intubated”.

The Luxembourg premier received one dose of the AstraZeneca coronavirus vaccine on May 6 but has not received his second jab. Bettel went into voluntary self-isolation on June 27 with mild Covid symptoms. He was then hospitalised on Sunday (July 4) for what was announced as a 24-hour precautionary measure.

The premier’s symptoms began less than 48 hours after he returned from a summit of the 27 European Union leaders in Brussels, but none of the others have been named as at risk of exposure.