Long Covid could be caused by an overload of tiny clots 'trapped' inside people's blood weeks after they clear the initial infection, scientists say. The small study found patients who are 'long haulers' have a large amount of inflammatory molecules trapped in their bloodstream.... The South African researcher who made the discovery said the micro clots may be the cause of long Covid or one of several contributing factors. The new discovery came from Professor Resia Pretorius from the department of physiological science at Stellenbosch University. Professor Pretorius compared blood collected from 11 people with long Covid and 13 healthy...