Peter Quigley, president and CEO of Troy-based Kelly Services, spoke with Crain’s Detroit Business reporter Kurt Nagl about the labor shortage, how long it will last and what long-term impact it will have on industries from manufacturing to health care. The exodus of nurses from the profession in the wake of the COVID-19 pandemic overwhelming hospitals is symbolic of what the coronavirus crisis did generally to the job market. The impact on health care has been a shortage of nurses, but at the same time, Quigley said, the company has seen improved fill rates of substitute teachers as nurses flock to other professions.