Eric Clapton, a critic of coronavirus vaccines and pandemic restrictions, has tested positive for COVID-19 and canceled two upcoming European gigs.

Clapton’s upcoming shows in Zurich on Tuesday and Milan on Wednesday will be rescheduled, he announced on his Facebook page and official online site. The 77-year-old rocker tested positive following his concert at London’s Royal Albert Hall on May 8.

“Eric is also anxious to avoid passing on any infection to any of his band, crew, promoters, their staff and of course, the fans,” the statement reads. He hopes to be able to resume the tour with two concerts in Bologna May 20.