Jane Clark Respiratory Specialist Physiotherapist at the Long COVID Clinic at King George Hospital in Ilford, London, Tuesday, May 11, 2021. The clinic has been set up to help patients suffering months after they were infected with COVID-19. It's one of 83 "long COVID" clinics in England where medics and patients are grappling with the enduring effects of the virus. (AP Photo/Kirsty Wigglesworth)