Earlier it was stated no fans will be admitted to Formula One's season-opening Australian Grand Prix if the race goes ahead, the Victoria state premier Daniel Andrews said on Friday.
McLaren said one team member had self-isolated in the hotel as a precaution.
Photographs of the skywriting were widely shared online but it was unclear who was responsible for them.
Organizers suspended ticket sales on Saturday as they assessed how many spectators would be allowed to attend the race.
The Chinese Grand Prix scheduled for Shanghai on April 19 has been called off as a result of the virus, which emerged in the central Chinese province of Hubei late last year.
"I think we do expect information from them (the Chinese promoter) imminently," Carey told Reuters in an interview at a conference in the Azeri capital and Formula One host Baku.
Readers of The Jerusalem Post have their say
Nissany, for the 2020 season, will race for Williams' Formula Two team and will get the chance to test the team's Formula One setup during Grand Prix practices.
Many Jerusalem residents are decidedly less sanguine about the formula road show's questionable timing, in the thick of the holidays, immediately after Yom Kippur and right before Succot.
Barkat says some 300,000 people were expected to view the Formula Road Show on Monday and Tuesday.