A newly emerging Covid variant, NB.1.8.1—commonly referred to as the Nimbus strain—is rapidly gaining ground in the United Kingdom (UK), sparking concern among health experts due to a particularly painful symptom.
The UK Health Security Agency (UKHSA) reports a near 10% surge in Covid-related hospital admissions, with 947 patients hospitalised in the week ending 31 May. Confirmed cases have also increased by 6.9%, reaching 1,211 infections in the week to 4 June.
What sets the Nimbus variant apart is a striking symptom described by doctors as a “razor blade sensation” in the throat.
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Dr. Naveed Asif, a general practitioner at the London General Practice, warns that the pain—intensely sharp and stabbing during swallowing—is being widely reported by those infected.
Other symptoms include extreme fatigue, mild coughing, muscle aches, nasal congestion, and in some cases, digestive issues such as nausea or diarrhoea, according to Dr Mohamed Imran Lakhi.
Despite the rising numbers, the World Health Organisation (WHO) says there is no indication that NB.1.8.1 causes more severe illness than previous variants. Approved Covid vaccines remain effective against it, offering protection and reducing the risk of serious outcomes.
Dr. Gayatri Amirthalingam, deputy director at UKHSA, acknowledged the variant’s growing presence but emphasised that current data does not show increased severity.
Individuals experiencing symptoms are advised to rest, stay hydrated, and use over-the-counter painkillers.
The NHS continues to recommend that anyone suspecting they have Covid remain at home and seek medical advice if symptoms worsen.
For urgent medical attention, such as difficulty breathing, the public is urged to call emergency services.
