Hospitals are worried that staffing levels won't be able to keep up with demand, as doctors, nurses and specialists such as respiratory therapists become exhausted or, worse, become infected or sick themselves. The typical workaround for staffing shortages — hiring clinicians from out of town — isn't the solution anymore, even though it helped ease the strain early in the pandemic, when the first surge of cases was concentrated in a handful of "hot spot" cities like New York, Detroit, Seattle and New Orleans.