The first Americans to recover from Covid-19 test drive immunity
The New York Times reports: Christy Karras and her husband received a tantalizing text the other day from friends they had not seen since February, when all four were among the first people in the United States to be sickened by the new coronavirus. “Dinner at our place?” It had been a week and a half since any of them had experienced symptoms, past the point when Covid-19 patients are thought to be contagious. And, assuming conventional virology wisdom applies,…