More infoFresh Covid variants, termed Stratus and Nimbus, have emerged as the dominant strains circulating across the UK, health officials have confirmed, potentially triggering a distinctive symptom. 1, given the moniker Nimbus, are presently the most widespread variants spreading across the UK, authorities have stated. Based on some reports, there might be distinctive symptoms with the newest ones - a croaky voice or a "razor blade" sore throat. Dr Aaron Glatt, chair of the department of medicine and chief of infectious diseases, told TODAY.com "A 'razor blade throat' is a very descriptive term describing severe sore throat pain - as if their throat is covered with razor blades - (like) with various viral infections. "While not specific to Covid-19, this expression has been used to describe sore throat symptoms in some patients with the most recent Covid-19 variant."