The other members of FAITH NO MORE issued a statement expressing disappointment and throwing support to Patton.
As a result of his infection, the band had to postpone six dates and cancel two on its current tour.
Smith has praised Davis for returning to the road so quickly after battling COVID.
Simmons credited his vaccination for keeping his infection "minimal".
Their show at the Azura Amphitheater on Friday night has lawn seats priced at under $10.
The diagnosis comes less than a week after his bandmate Paul Stanley's.
IRON MAIDEN’s BRUCE DICKINSON Finds It Incredible That Some People Are Still Resistant To Getting Vaccinated
Dickinson discussed his battle with COVID in a new interview.
Smith spoke about what it has been like for him and bandmates to play live shows during the pandemic.
Davis says even two weeks after he tested positive, the band has been forced to postpone six dates on its tour.
The 47-year-old singer, who is fully vaccinated, was forced to call off his appearance at a pop culture convention.