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PARIS, June 20, 2025
Even though COVID-19 is no longer dominating headlines, the virus hasn’t disappeared. The NB.1.8.1 variant, also known as “Nimbus,” has been spreading across Europe for several weeks and has been detected in 22 countries, representing almost 11% of global sequences at the end of April, according to the World Health Institution (WHO).
The NB.1.8.1 variant of COVID-19, also known as “nimbus,” is circulating in Europe and has been classified as “varying under surveillance” by the WHO.
- The Nimbus variant has been detected in 22 countries.
- the WHO classifies it as “varying under surveillance.”
- A sore throat described as a “razor blade” sensation is a key symptom.
Did you know?-The classification “varying under surveillance” means the WHO is monitoring the variant’s characteristics and spread,but it does not currently pose an elevated risk to public health.
What are the symptoms of the NB.1.8.1 variant? According to Dr. Naveed Asif, a general practitioner, the most distinctive symptom is a sore throat that feels like a “razor blade.” This means experiencing sharp,throbbing pain,especially when swallowing,often felt at the back of the throat. If you experience this symptom, Dr. Asif recommends getting tested for the Nimbus variant.
reader question:-If I’ve already been vaccinated and boosted, how concerned should I be about the Nimbus variant? share your thoughts in the comments below.
While the “razor blade” sore throat may be uncomfortable, health professionals beleive the Nimbus variant poses no greater health risk than other circulating variants. The WHO states that current data does not indicate this variant leads to more severe illness. Moreover, the WHO believes that existing approved vaccines are effective against the Nimbus strain.
If you suspect you have this COVID variant and are experiencing the “razor blade” sore throat,Dr. Asif suggests
The NB.1.8.1 Variant: what’s Next?
The Nimbus variant, NB.1.8.1, is a descendant of the Omicron variant [[3]]. After being detected in China in January, the World Health Institution (WHO) classified it as a “variant under monitoring” in May [[2]]. With concerns about potential summer surges, it’s essential to stay informed about this evolving strain.
This section delves deeper into the characteristics of NB.1.8.1, its potential impact, and the steps we can take to stay safe. We’ll look beyond the “razor blade” sore throat to paint a fuller picture.
Understanding the spread and Concerns
Initially detected in China, the NB.1.8.1 variant has spread, and by the end of April it was present in 22 countries [[1]]. This variant is now the second-most prevalent in the US [[1]]. Public health experts are tracking this development closely.
Is NB.1.8.1 cause for widespread alarm? Currently, the WHO classifies it as “varying under surveillance,” not posing an elevated risk to public health. While it’s crucial to monitor its spread and evolution, existing data doesn’t suggest more severe illness.
Key Symptoms and What to Do
As mentioned earlier,the “razor blade” sore throat is a hallmark symptom,as noted by Dr. Naveed Asif. But what else should you be watching for? This is what you need to know.
- Beyond the Sore Throat: While the sore throat is a primary indicator, other common COVID-19 symptoms, like fever, cough, fatigue, and body aches, may also be present.
- Testing is Key: if you experience the “razor blade” sore throat or other symptoms, get tested. This can help determine if you have NB.1.8.1, and this is crucial for tracking the variant’s spread.
- Isolation: Follow local health guidelines regarding isolation if you test positive. Staying away from others helps prevent further spread.
Vaccination’s Role
You may be asking if your current vaccinations protect against NB.1.8.1. The existing COVID-19 vaccines are expected to be effective in protecting against severe illness, hospitalization, and death from the Nimbus variant. The WHO also suggests current vaccines offer good protection [[2]].
Staying up-to-date with recommended boosters is beneficial. Boosters can definitely help enhance your immune response and provide broader protection against emerging variants.
Practical Tips for Staying Safe
Beyond vaccination and boosters, you can take several steps to minimize your risks. You can improve your safety by remaining vigilant.
- Practice Good Hygiene: Wash your hands frequently with soap and water, or use an alcohol-based hand sanitizer.
- Mask Up: Consider wearing a high-quality mask, especially in crowded indoor spaces or if you are at higher risk.
- Stay Informed: Keep up-to-date with the latest recommendations and guidelines from your local health authorities and the WHO.
- Ventilation: Improve air quality in your home and office by opening windows or using air purifiers.
- Be Mindful of Symptoms: Pay attention to any new symptoms you experience.
NB.1.8.1: Myths vs. Facts
| Myth | Fact |
|---|---|
| NB.1.8.1 is considerably more risky than previous variants. | Current data do not indicate that NB.1.8.1 leads to more severe illness. |
| Vaccines are ineffective against NB.1.8.1. | Existing vaccines are expected to be effective in preventing serious outcomes from the Nimbus variant. |
| The “razor blade” sore throat is the only symptom of NB.1.8.1. | Other common COVID-19 symptoms may also be present. |
Frequently Asked Questions (FAQs)
Here’s what you need to know about NB.1.8.1.
Is NB.1.8.1 more transmissible? While the degree of transmissibility is still under examination,its spread suggests it might very well be.
Do I need a new vaccine? Not necessarily. Current vaccines are considered effective, but stay updated with any new recommendations.
Should I be concerned if I have been vaccinated and boosted? Being vaccinated and boosted offers good protection. Continue to practice preventative measures and get tested if you experience symptoms.
Where can I find more information? Consult the WHO, CDC, and your local health authorities for the most up-to-date details.
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