Olfactory training in COVID-19 associated loss of smell

The SARS-CoV-2 infection (COVID-19) shows a noticeable involvement of the olfactory system with impaired sense of smell in many patients, often persisting even after recovery from COVID-19. As the sense of smell has an important role within social communication and quality of life, olfactory dysfunction is a serious problem poorly studied with few therapeutic options. Studies on persistent loss of smell due to traumatic brain injury or due to other viral infections have shown that a structured olfactory training could represent one possible therapeutic option. The aim of this study is to investigate the effects of a structured olfactory training in COVID-19 associated persistent olfactory dysfunction.