Collen didn't seem encouraged when asked about the odds of the postponed tour moving forward in 2021.
"I honestly don't know. I'd say it's 50/50," he said in a recent conversation with Eddie Trunk. "If everyone does what they are supposed to do, then we will be there next summer."
The novel coronavirus pandemic has resulted in widespread cancellations. Fears of the spread of the virus have resulted in live concerts being called off in all but a few places in the world.
Collen makes his home in California, which is one of many U.S. states experiencing a troubling resurgence in COVID-19 in cases just a matter of months after relaxing restrictions on social distancing.
Def Leppard frontman Joe Elliott recently told Express that the band would be ready to play again when it was safe for concerts to resume. But he also suggested that the band wouldn't take any chances with the pandemic respiratory disease. He related a story about how severe pneumonia nearly ended his career a few years ago.
Weeks before the 'Stadium Tour' was postponed, Jett said she wouldn't feel comfortable touring before there was a COVID-19 vaccine or proven treatment for the disease.
Poison frontman Bret Michaels, a type 1 diabetic in a high-risk category for COVID, began canceling live appearances before U.S. states began shutting down.
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