Tens of millions of people worldwide have long Covid, a multisystem illness that can arise after a bout of Covid-19. It’s one of several complex chronic medical conditions with symptoms like fatigue, post-exertional malaise, cognitive impairment, pain, and neurological and sleep issues. (Myalgic encephalomyelitis/chronic fatigue syndrome, or ME/CFS; postural orthostatic tachycardia syndrome, or POTS; and Ehlers-Danlos syndrome, or EDS, are others, to name a few.) What is it like to work while experiencing one of these conditions? And how much do people’s colleagues and managers know about how to accommodate employees who have them?