The superintendent, Bennett Walsh, said earlier this month state officials knew that the home was in “crisis mode” when it came to staffing shortages and were notified early and often about the contagion at the facility.

Staffing problems that plagued the home for years contributed to the virus spreading like wildfire, said Joan Miller, a nurse at the home.

Because staffing was so tight, workers from one unit were constantly moving to other units to help out — and bringing their germs with them, she said. At one point, a unit was shut down because there wasn’t enough staff to operate it, and those veterans were moved into close quarters in other parts of the building, she said.