A new Covid variant spreading in the UK may cause a distinctive and painful symptom described as a 'razor blade sensation' in the throat, doctors have warned. The Nimbus strain, scientifically known as NB.1.8.1, is being monitored by the World Health Organisation as it spreads globally.
Data from the UK Health Security Agency shows Covid-related hospital admissions rose nearly 10 per cent in the week to 31 May, with 947 patients admitted. Cases also increased by 6.9 per cent, reaching 1,211 in the week to 4 June. Dr Naveed Asif, a GP at the London General Practice, noted that the variant often causes a severe sore throat, making swallowing painful.
Dr Mohamed Imran Lakhi told The Mirror that common symptoms include severe sore throat, persistent fatigue, mild cough, fever, muscle aches, and nasal congestion. Some patients also experience digestive issues like nausea or diarrhoea, which are less typical for Covid variants. The NHS advises those with symptoms to stay home.
Despite the rise in cases, the WHO stated that current data does not suggest the Nimbus variant causes more severe illness than other circulating strains. Vaccines remain effective against it, according to a WHO spokesperson. Dr Gayatri Amirthalingam of UKHSA confirmed that while NB.1.8.1 is growing as a proportion of cases, there is no evidence of increased severity or reduced vaccine effectiveness.
Rest, fluids, and painkillers are recommended for the sore throat. If symptoms persist or worsen, individuals should contact a GP or call NHS 111. In serious cases, such as difficulty breathing, call 999.



