Late in March, Laura Gross, 72, was recovering from gall bladder surgery in her Fort Lee, New Jersey, home when she became sick again.

Her throat, head and eyes hurt, her muscles and joints ached and she felt like she was in a fog. Her diagnosis was COVID-19. Four months later, these symptoms remain.

Gross sees a primary care doctor and specialists including a cardiologist, pulmonologist, endocrinologist, neurologist, and gastroenterologist.