It's nearly impossible.
NYS is testing us once a week. They were testing twice a week for a while but the cost was enormous. They are not testing hospital workers at all from what I know.
Staff are the ones spreading it in nursing homes. As long as the nursing home workers aren't isolating after work it will continue to spread in these facilities.
It's a terrible situation. It's very hard to stop the spread because the ventilation is awful, residents need to take their masks off to eat and it's impossible to keep a mask on someone with severe dementia.