Stanley’s illness was disclosed earlier this week and Simmons’ illness was disclosed Wednesday.
According to a statement from the band, Simmons is experiencing “mild symptoms”.
The tour is expected to resume on September 9 in Irvine, California. The band and crew will be in isolation for the next 10 days as a precaution, the statement said.
Postponed dates include shows in Michigan, Ohio, Illinois and Wisconsin.
The band had previously postponed a show in Burgetstown, Pennsylvania, after news of Stanley’s positive test emerged.