Celtic's Odsonne Edouard says he is "fine" and will "come back stronger" after testing positive for coronavirus on France Under-21 duty.
The striker, 22, is self-isolating, and will miss European qualifiers against Liechtenstein and Slovakia, after his Tuesday screening came back positive.
Celtic say the remainder of their squad, including those on international duty, have all tested negative.
The Scottish champions return to action in 10 days when they host Rangers.
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Attacking midfielder Ryan Christie will miss that Old Firm derby as he is self-isolating, having been in close contact with Scotland team-mate Stuart Armstrong who tested positive prior to the Euro play-off against Israel.
Edouard played the opening hour of Celtic's 2-0 league win at St Johnstone on Sunday.
He posted on social media on Wednesday with the update on his condition and thanking fans for their support.
National clinical director Professor Jason Leitch told BBC Scotland at the weekend, in reference to the entire Kilmarnock squad having to self-isolate after six positive tests: "It is a timing thing.
"With any positive test, people are asked to detail their movements in the 48 hours before they first started to notice symptoms.
"If they were not mixing with the squad in that time, the risk of transmission is less."
Celtic are the seventh of 12 Premiership clubs to have at least one positive test. And while some produced a negative outcome on subsequent screening, the affected person still has to self-isolate.
Edouard, a £9m signing from Paris St-Germain in 2018 after a successful loan spell, has six goals in 10 games for the Scottish champions this season.
He was Celtic's top scorer with 28 goals last term and has netted 67 times in 136 appearances for the Glasgow side.