F1's Leclerc tests positive for Covid-19
"I want to let you know that I have tested positive for Covid-19," the Monegasque driver said on Twitter.
Leclerc, 23, added that he had "mild symptoms" and was isolating at his home in his native Monaco.
He finished eighth last season after making just two podium finishes in a dreadful 17-race campaign for Ferrari in which four-time world champion Sebastian Vettel slumped to 13th in the drivers' standings.
On Tuesday this year's Australian GP, the traditional season opener, was pushed back until November as the coronavirus pandemic forced a 2021 calendar rejig.
The Chinese GP was also shelved with no new date for that race yet scheduled.