People across the UK are being advised to stay alert for a symptom that lasts more than an hour, which could indicate a COVID-19 infection. According to the latest figures from the UK Health Security Agency (UKHSA), coronavirus cases are once again climbing in hospitals throughout England. The data shows that the XFG variant, also known as the Stratus strain, has now become the dominant form of the virus. Here’s what the NHS has said about this unusual symptom and what to look out for.New Covid Strain Shows Unique Symptom Lasting More Than 60 Minutes in the UKTo help prevent further spread of COVID-19, the NHS is reminding people of the key symptoms to watch for. On its official site, the health service highlights one particular sign that can persist for more than an hour, a new, continuous cough. The NHS explains: “This means coughing frequently for over an hour, or having three or more coughing episodes within a 24-hour period.”It further notes that these symptoms can resemble those of common colds or the flu. “Most people recover within a few weeks, though in some cases, recovery may take longer. For others, the illness can be more severe, and symptoms may linger,” the advice adds.The NHS recommends staying home and limiting contact with others if you or your child have symptoms and either:Have a high temperatureDon’t feel well enough to work, study, or carry out daily activitiesYou can return to normal routines once your temperature is normal and you feel well again.Stratus: The Most Dominant Covid Strain in the UKHealth experts have confirmed that the XFG variant, referred to as Stratus, is currently the most common strain circulating in the UK. In previous weeks, the NB.1.8.1 strain, known as Nimbus, had also been widely detected.In a recent statement, the UKHSA cautioned that these newer variants may cause symptoms such as a hoarse voice or a “particularly painful” sore throat in addition to standard COVID-19 signs. While there are no longer any government-enforced rules about isolation, the NHS continues to recommend caution and responsible behaviour if you test positive for the virus.Stratus Covid Symptoms to Look Out ForOther COVID-19 symptoms to monitor include:High temperature or chills (feeling hot to the touch on the chest or back)Change or loss of smell or tasteShortness of breathFatigue or exhaustionBody achesHeadacheSore throatBlocked or runny noseLoss of appetiteDiarrhoeaNausea or vomitingHave You Got a Razor-Blade Sore Throat?It’s normal for viruses to evolve as they move between people. When enough changes occur, new versions, or variants emerge. Recent reports suggest that the latest strains may cause distinctive signs such as a hoarse voice or a sore throat described as feeling like “razor blades.”COVID-19 can still produce a wide range of symptoms, from headaches and nasal congestion to exhaustion, making it easy to confuse with the flu or a cold. If you believe you have COVID-19, try to avoid close contact with vulnerable individuals and remain at home whenever possible.If you must go out, it is advised to wear a face covering. Regular hand washing and safely discarding used tissues can help stop the virus from spreading. For throat discomfort, the NHS suggests staying hydrated and taking a teaspoon of honey for relief.According to the Royal College of General Practitioners, COVID-19 cases are currently rising across the UK, particularly among children and older adults.