A fire that broke out on the roof of Methodist Hospital's Centennial Tower was caused by a piece of equipment, hospital officials said.
"As health care workers we've taken a sacred oath to do everything possible to keep our patients safe and healthy," the hospital's CEO wrote.
The county confirmed all three residents were vaccinated with two doses, but did not report whether they had received their booster shot.
It's the first time since earlier this year that a variant other than delta has been detected at the hospital.
Dr. Mary Bowden received the suspension after the hospital system said she was "spreading dangerous misinformation" about the COVID vaccine.
Houston Methodist has suspended privileges for a Houston doctor for 'spreading dangerous misinformation' about the COVID-19 vaccine and treatments.