At any time all health care can be a life or death situation.  Even if she's just an aide, helping somebody walk back to their room from the cafeteria.  If she lets somebody fall, they break a hip, end up in the hospital having to have hip surgery.  They can contract a staph infection in the incision site, a bladder infection from the catheter they insert during surgery, pneumonia from laying in bed recuperating from hip surgery, etc.  Even if she's just giving people baths, she's a danger.  And heaven help us if she's passing meds or a nurse!