Archive · 17 Jun 2025
Nimbus COVID-19 Variant: New Variant Spreading Globally
A new version of the COVID-19 virus, called Nimbus (NB.1.8.1), is spreading around the world.
It's similar to other Omicron variants, with symptoms like a cough, fever, and feeling tired.
Some people have reported a very sore throat.
The WHO says it's not a big threat, and current vaccines should still work.
Doctors are watching to see how it spreads and if it changes.
The Nimbus (NB.1.8.1) Omicron sub-variant is spreading globally, including in the US, UK, and Asia.
The WHO is closely monitoring the variant, first identified in January 2025.
Symptoms include cough, fever, fatigue, muscle aches, and headache; some report "razor blade throat".
The WHO assesses the global public health risk from Nimbus as 'low'.
Current vaccines are expected to remain effective against this variant.
- Who
- The World Health Organisation (WHO) and health officials are monitoring the situation.
- What
- The spread of the Nimbus (NB.1.8.1) Omicron sub-variant of COVID-19.
- When
- Identified in January 2025, and as of the time of this article, it's currently spreading.
- Where
- The US, UK, China, Singapore, Thailand, India, and other countries.
- Why
- To understand the spread, symptoms, and potential risks associated with the new variant.
Severity
Not Applicable.
Severity
Severity
Nimbus is a fast-spreading strain that may not be deadly.
Not Applicable.
Not applicable.
- Variant Name
- NB.1.8.1 (Nimbus)
- Variant Type
- Omicron sub-variant
- Common Symptoms
- Cough, fever, fatigue, muscle aches, congestion, headache, nausea or vomiting, new loss of smell/taste
- Specific Symptom
- "Razor blade throat"
- Global Risk Assessment
- Low
- Vaccine Effectiveness
- Current vaccines expected to be effective
