John, 57, blamed the infection for the cancellation of his planned show December 12 at the Scottish Exhibition and Conference Center in Glasgow – the fourth concert in a tour of Britain. Two nights earlier, he had canceled a concert in Nottingham.

“I’ve been doing all that I can to try to get my voice back and I’ve seen a throat specialist again today and he’s advised that it would be foolish to go ahead with tonight’s show,” John said in a statement.

Earlier this month, the rock legend was honored with a star-studded tribute at the Kennedy Center.