KISS' Paul Stanley Felt Tired, Lost Voice with COVID-19 Says Gene Simmons

Gene Simmons says his KISS co-founder, Paul Stanley, is not feeling great after catching COVID, but he's going to be just fine thanks to the vaccine ... and Gene's urging everyone to get their shots too.

The famous rock 'n' roller joined "TMZ Live" Friday to talk about canceling the band's Pennsylvania show after Paul tested positive for the coronavirus.

Gene says Paul, who's been fully vaccinated, started to lose his voice Thursday and felt tired so the band's doctor suggested he and the crew get a COVID test. Sure enough, Paul tested positive ... and Gene says everyone else on the tour was tested too, but all came back negative.

Gene says everyone involved is quarantining to make sure additional tests don't come up positive. As for Paul, medical professionals advise COVID carriers quarantine for 10 days.

Gene says there is no KISS without Paul, which likely means the band won't hit the stage again until Sept. 9 in Irvine, CA. So upcoming shows in NC, GA, MI, OH, IL and WI will almost certainly be rescheduled.