When COVID-19 first hit America and started spreading, Dr. David Brownstein, owner of the Center for Holistic Medicine in West Bloomfield, Michigan, thought he could help. For 28 years, he’d been successfully treating flu and pneumonia through boosting patients’ immune systems with vitamins and minerals. Coronavirus was a completely different pathology, deadlier and more mysterious. But Brownstein wasn’t inclined to give up on his patients. “I told my staff, ‘I’m working till I either get sick or they don’t let me,’” he said.