The COVID-19 virus has re-emerged after a period of relative calm, leading to a surge in cases globally, including in India. While most cases remain mild with patients recovering at home, health officials advise caution, especially for individuals with co-morbidities, pregnant women, and the elderly.
However, the virus continues to evolve, giving rise to new variants with differing transmission patterns and symptoms. One recent variant, NB.1.8.1, dubbed "Nimbus," has garnered attention due to its prominent symptom: a severely painful sore throat, often described as "razor blade throat."
The Nimbus variant (NB.1.8.1), a descendant of Omicron, was first identified in January 2025. Since then, it has rapidly spread to numerous countries, including the United States, Canada, the United Kingdom, India, and various parts of Asia. The World Health Organization (WHO) currently assesses the variant as mild, not causing severe illness.
Doctors are reporting that a significant number of Nimbus-infected patients are experiencing an exceptionally painful sore throat, making even swallowing water a challenge. Some patients describe the sensation as "swallowing razor blades" or "glass," a departure from the milder sore throats associated with earlier COVID-19 variants.
Experts suggest that the severe throat pain stems from the virus causing intense inflammation and irritation within the throat tissues. This inflammation leads to pain that is further aggravated during eating and drinking. The throat often feels dry and cracked, intensifying the discomfort.
While the excruciating sore throat is a hallmark of the Nimbus variant, it typically accompanies other common COVID-19 symptoms:
These symptoms are consistent with those observed in other Omicron variants.
It is important to note that not all sore throats are indicative of COVID-19. However, if you experience a sharp or burning sore throat, particularly if swallowing is difficult, coupled with other symptoms, consider the following:
It is crucial to remember that sore throats can also result from bacterial infections treatable with antibiotics. As COVID-19 is a virus, antibiotics are ineffective. Therefore, avoid self-medicating and consult a physician for proper diagnosis and treatment.
The existing COVID-19 vaccines, particularly with updated boosters, continue to provide protection against severe illness, hospitalization, and death caused by the Nimbus variant. While the variant may cause painful symptoms such as sore throat, vaccinated individuals generally experience milder cases.
Source: World Health Organization, the Centers for Disease Control and Prevention
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