Health-care workers are under threat from more than just the coronavirus itself: The mental health effects of the work are grave. Doctors and nurses fighting Covid-19 are watching patients die at rates rarely seen in civilian medicine; and they’re delivering the news to family members who aren’t allowed inside the hospital for fear of spreading the disease. Hospitals are trying to treat the minds and hearts of the healers by offering counseling, crisis hotlines and therapy dogs. Emma Court discusses the scars the pandemic is leaving on hospital workers, and what the health care system can do about it.