Thousands of medical practices have closed during the pandemic, according to a July survey of 3,500 doctors by the Physicians Foundation, a nonprofit group. About 8 percent of the doctors reported closing their offices in recent months, which the foundation estimated could equal some 16,000 practices. Another 4 percent said they planned to shutter within the next year.

Other doctors and nurses are retiring early or leaving their jobs. Some worry about their own health because of age or a medical condition that puts them at high risk. Others stopped practicing during the worst of the outbreaks and don’t have the energy to start again. Some simply need a break from the toll that the pandemic has taken among their ranks and their patients…

The clinicians also painted a grim picture of their lives, as the pandemic enters a newly robust phase with record case counts in the United States. About half already said their mental exhaustion was at an all-time high. Many worried about keeping their doors open: about 7 percent said they were not sure they could remain open past December without financial help.

For some, family obligations left them no choice.