Grammy-winning American singer 73 year old John Prine is in 'critical' condition and being treated for the coronavirus. The singer was hospitalised on Thursday. John, a prolific songwriter was awarded a Grammy Lifetime Achievement award in January. John has had past surgeries for cancer in his neck and lung. On March 20th, Prine's wife, Fiona, had said, she had tested positive for the coronavirus, so had Prine, but his condition was 'indeterminate'.