A study has found that many patients with COVID-19 produce immune responses against their body's own tissues or organs. …It is not fully understand what causes these symptoms, but one of the possibilities is that COVID-19 is triggering an autoimmune process where the immune system is misdirected to attack itself. The study investigated…common autoantibodies produced in 84 individuals who either had severe COVID-19 at the time of testing or in the recovery period following both severe COVID-19 and those with milder disease that did not need to attend hospital. These results were compared to a control group of 32 patients...