Try 'smell training' while recovering from Covid-19: New study Prasun Sonwalkar/London Alamy The research against the use of corticosteroids is contrary to conventional prescription to regain smell. Instead of using drugs such as corticosteroids to regain the sense of smell while recovering from Covid-19, a new study by an international team of researchers suggests a period of ‘smell training’ as a free and simple way to retrain the brain to recognise smells. Losing the sense of smell and taste is recognised as one of the key symptoms of Covid-19, with many losing smell on a long-term basis. Usually, corticosteroids are prescribed to help regain smell, but the study published in the journal