The fast-spreading NB.1.8.1 variant triggers painful sore throats and flu-like symptoms; WHO monitoring situation amid global vaccine policy shifts
A newly emerged Covid-19 variant, unofficially named “Nimbus” (NB.1.8.1), is sparking concern among health authorities across continents due to its unusual symptom profile — including an excruciating sore throat described as feeling like “razor blades” — and its growing presence in Asia, Europe, North America, and Canada.
Currently accounting for over 10% of new infections in Asia, the variant is under active surveillance by the World Health Organization (WHO). A preprint study, not yet peer-reviewed, has flagged the strain’s high immune escape potential, raising the possibility that NB.1.8.1 could dominate global case counts in the near future.
Razor-Like Symptoms and Traditional Covid Effects
According to Salon, “Nimbus” produces an especially severe sore throat, often referred to as “razor blade throat.” Other reported symptoms include typical flu-like effects such as nasal congestion, fatigue, low-grade cough, muscle aches, fever, and, less frequently, nausea and diarrhea, as noted by The Independent.
Despite its rising spread, the WHO has classified the global risk as “low,” asserting that current vaccines remain effective at preventing severe outcomes.
Experts Warn Against Complacency
Public health experts are urging caution as the variant spreads.
“NB.1.8.1 is a strong candidate for the summer surge,” said Dr. Rajendram Rajnarayanan of the New York Institute of Technology.
“I know everybody wants to forget about this disease, but it’s not going to allow us to,” added Dr. Janko Nikolich, Chair of Immunobiology at the University of Arizona College of Medicine, speaking to ABC Action News.
Political Controversy: Vaccine Rollbacks Under Scrutiny
The emergence of the new strain coincides with controversial moves from the Trump administration, now under Health and Human Services Secretary Robert F. Kennedy Jr., which has rolled back Covid vaccination recommendations for children and pregnant women.
Medical professionals have responded sharply.
“The science has not changed,” said Dr. Steven J. Fleischman, President of the American College of Obstetricians and Gynecologists, via NPR.
“COVID infection during pregnancy can be catastrophic and lead to major disability. Vaccination protects both mother and newborn.”
While experts emphasize that vaccines remain effective, concerns remain over whether the latest wave of anti-vaccine sentiment and policy rollback may impact public readiness to confront another Covid resurgence.
As health systems continue to monitor NB.1.8.1’s spread, scientists stress vigilance and testing while urging governments to stay ahead of the virus’ evolving nature.