Arthur’s Theme (Best That You Can Do) hitmaker Christopher Cross has become the latest musician to test positive for the coronavirus.The singer/songwriter revealed the news in a message he posted to Facebook on Friday, explaining he only agreed to share the information with fans and followers in the hope his diagnosis might help someone else.“I’m not in the habit of discussing medical issues on social media, but I do so in hope this will help other people to understand how serious and how contagious this illness is,” the Sailing star wrote.“Although I am fortunate enough to be cared for at home, this is possibly the worst illness I’ve ever had.