Paul McCartney has been forced to cancel the remainder of his Japanese tour due to illness. As reported by BBC News, the former Beatles is believed to have contracted a virus. The veteran rocker’s website indicates doctors have ordered “complete rest.”

The announcement includes cancellation of a show at the Nippon Budokan in Tokyo, where The Beatles famously performed during their first Japanese tour in 1966.

McCartney is still scheduled to perform a concert in Seoul, South Korea, on May 28, as well as 19 performances in the U.S. “Thank you so much for your kind messages of support,” reads a message on his website. “I’m so very touched. Unfortunately my condition has not improved … I'm so disappointed and sorry to be letting my fans down.” McCartney also thanked his Japanese fans for “such a beautiful and warm welcome to your country.”