LONDON : Although uncommon, infection with the novel coronavirus may cause sudden permanent hearing loss in some patients, according to a study which is the first case report linking the disabling condition to COVID-19 in the UK.According to the scientists, including those from the University College London in the UK, awareness of this possible side effect is important since a prompt course of steroid treatment can reverse the hearing loss.They said while the causes are not very clear, the condition sometimes follows a viral infection, such as flu or herpes.The research, published in the journal BMJ Case Reports, describes the case of a 45 year old man with asthma who was referred to the Royal National Throat Nose and Ear Hospital in the UK.