Painkiller aspirin will be evaluated as a possible treatment for COVID-19 in one of Britain’s biggest trials, which will assess whether it might reduce the risk of blood clots in people with the disease. The scientists behind the RECOVERY trial, which is looking into a range of potential treatments for COVID-19, said it would include the drug, which is commonly used as a blood thinner. Patients infected with the coronavirus are at a higher risk of blood clots because of hyper-reactive platelets, the cell fragments that help stop bleeding. Aspirin is an antiplatelet agent and can reduce the risk of clots, the RECOVERY trial’s website said on Friday.