Nimbus Variant Spreads Rapidly, Causes Severe Throat Pain

A new variant of COVID-19, designated as NB.1.8.1 and named Nimbus, is rapidly spreading across the United States, drawing the attention of health authorities due to its distinctive symptom of "knife throat." This symptom is characterized by a sharp, cutting pain in the throat, which has been reported by some individuals infected with Nimbus. The variant, part of the broader Omicron family, is causing concern due to its potential for increased transmission and the possibility of more severe outcomes in vulnerable populations.

Nimbus, first detected in January 2025, has quickly become a significant competitor to other dominant strains. Its transmission rate is alarming, with data showing that it accounted for 15% of reported cases in the two weeks leading up to May 24, and this figure surged to 37% by June 7. During the same period, the main strain, LP.8.1, accounted for 38% of cases. This rapid increase in prevalence highlights the need for vigilance and proactive measures to control its spread.

The symptoms of Nimbus overlap with those of other COVID-19 variants, including coughing, runny nose, shortness of breath, fever, chills, headache, muscle pain, fatigue, and loss of taste or smell. However, the "knife throat" symptom is particularly notable, with infected individuals describing the pain as feeling like swallowing a blade. This symptom, while not unique to Nimbus, is reported to be more severe in cases of this variant, adding to the concern among health officials.

Experts have noted that while throat pain is a common symptom of COVID-19, the intensity of the pain can vary among individuals. Peter Chin-Hong, a specialist in infectious diseases at the University of California, San Francisco, has pointed out that all variants of the virus can cause severe throat pain, and the level of discomfort can differ from person to person. This underscores the importance of seeking medical attention if experiencing severe symptoms, as it could indicate a COVID-19 infection.

Health authorities are closely monitoring the situation and providing updated guidance to the public. The public is advised to continue following recommended safety measures, such as wearing masks, practicing social distancing, and getting vaccinated. These precautions are crucial in slowing the spread of the virus and protecting vulnerable populations from infection. As the situation evolves, health officials will continue to provide updates and recommendations to ensure the safety and well-being of the public.