Brigham and Women’s Hospital in Boston is experiencing an outbreak of COVID-19 among patients and staff, which the facility blames partly on lapses in infection control practices by employees.

The hospital, a Harvard Medical School teaching facility, reported on September 26 that 23 employees and 11 patients tested positive as a result of exposure within the hospital. The outbreak was first detected on September 22, and cases have risen with increased testing. The hospital said it had tested 400 employees and 54 patients as of September 26.

Brigham and Women’s is not alone in trying to keep COVID-19 from rearing its head within its walls. Hospitals and health departments reported an outbreak in late August in Washington and in early September at a hospital in Connecticut.

The Boston Globe reported in late September that Beth Israel Deaconess Hospital-Plymouth and New England Baptist Hospital both had recent outbreaks at their facilities,