Singer-songwriter Christopher Cross has tested positive for the novel coronavirus, he said in an Instagram post Friday.

"I'm sorry to report that I am among the growing number of Americans who tested positive for the COVID-19," he wrote in the post. "I'm not in the habit of discussing medical issues on social media, but I do so in the hopes that this will help other people to understand how serious and how contagious this illness is. Although I am fortunate enough to be cared for at home, this is possibly the worst illness I have ever had."

Cross, 68, also urged his fans to take the virus seriously and stay home, wash their hands and avoid touching their faces.

"For those of you who still do not believe the COVID-19 virus is real, or think it is a 'hoax' or part of some conspiracy, my advice to you is to understand right now that this is a deadly illness spreading like wildfire throughout the world," the Grammy Award winner wrote, encouraging followers to visit the Centers for Disease Control and Prevention's website.

He added that everyone should "be kind to one another."

"Only if we work together can we defeat COVID-19," he wrote.

Several other celebrities, including Pink, Tom Hanks, Rita Wilson, Idris Elba and CNN's Chris Cuomo, have tested positive for the virus.

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