How to spot the signs of long Covid — and what to do next

Stuart Katz, a cardiologist at NYU Langone, got Covid-19 in December 2020, right before he was able to receive the Covid-19 vaccine as a health care professional. When we spoke for this article, more than a year since his infection, he told me excitedly that he just discovered he was able to eat honey again without it tasting awful. His extreme fatigue and brain fog had subsided after about six months, he says. Some aren’t so lucky.

Strange and sometimes debilitating symptoms lasting long past the original bout of sickness...