Clinical Nurse Supervisor Melinda Chapin, of Holderness, N.H., right, departs an isolation room while Edward Merrens, left, chief clinical officer at Dartmouth-Hitchcock Health, visits a COVID-19 patient at Dartmouth-Hitchcock Medical Center, in Lebanon, N.H., Jan. 3, 2022. The omicron variant has caused a surge of new cases of COVID-19 in the U.S. and many hospitals are not only swamped with cases but severely shorthanded because of so many employees out with COVID-19. Credit: AP Photo/Steven Senne, File