By ED WHITE Natalie Balli, 71, and her twin sister, Linda Calderon, background right, watch TV as they rest in their beds in a COVID-19 unit at Providence Holy Cross Medical Center in Los Angeles, Friday, Dec. 17, 2021. The sisters were admitted to the hospital on the same day, a few days after their Thanksgiving gathering. (AP Photo/Jae C. Hong) Hospitals across the country are struggling to cope with