A source at the Turin club said: “The situation is being taken very seriously and the medical staff have told all the players to keep washing their hands and using hand gels.
“No one has tested positive but bearing in mind the Inter game has been postponed because of health concerns nothing is being taken for granted.
“Some of the players involved in the Under 23 match did train midweek with Ronaldo and the first team but that will now not happen again for a few weeks.”
Matches at Udinese, AC Milan, Parma and Sassuolo have also fallen victim and have been rescheduled for May 13.
Italy is the highest affected country in Europe with 1,128 confirmed cases and 29 deaths. Both figures are expected to rise rapidly.
Sporting events across the globe have been cancelled including the Chinese