Symptoms of Nimbus COVID-19 variant: Watch out for sore throat, body-ache, fever, more

The latest strain of COVID-19, officially named NB.1.8.1 and informally called Nimbus, has recently been flagged by health authorities due to its rising presence in multiple countries. While not as severe as previous waves, experts caution that its mild onset symptoms can delay testing and lead to unintentional spread.

According to the World Health Organization (WHO), Nimbus is a new version of the Omicron strain of the virus that causes Covid-19. It’s also called NB.1.8.1. The WHO is keeping an eye on it, but says the overall risk to the public is low right now.

Moreover, the Centers for Disease Control and Prevention (CDC) in the US says that Nimbus is now behind 37 percent of Covid cases in America. So far, it's spreading, but doesn’t seem to cause worse symptoms than earlier types. Which means nimbus is a version of Covid worth watching, but there’s no need to panic. Stay updated, take your vaccines, and follow basic hygiene practices.

Also read | NB.1.8.1 COVID-19 variant cases and symptoms: 7 things to know about this new COVID-19 strain

Symptoms and protection tips for NB.1.8.1 Nimbus:

• Recognise unusual fatigue: Early reports show most patients complain of an overwhelming tiredness that appears without physical exertion. Unlike regular fatigue, it lingers for days even after full rest.

• Watch for low-grade fever: Nimbus often begins with a persistent low fever between 99–100°F. It’s easy to ignore, but when paired with tiredness or headache, it's worth getting tested.

• Notice a scratchy throat: Rather than a painful sore throat, many experience a dry or tickly sensation that worsens over time. It may come with mild hoarseness or coughing.

• Check for body aches: Even without a high fever, Nimbus may cause muscular aches and joint stiffness, especially in the back and legs. This is often confused with routine exhaustion.

• Be aware of sinus-like pressure: Some patients report a blocked nose or sinus pressure without a runny nose. If this is paired with fatigue, it may signal a developing infection.

• Mask up in public spaces: Health experts still recommend wearing a well-fitted mask, especially indoors or on public transport, even if local mandates have eased.

• Revisit hand hygiene: Frequent handwashing and avoiding face-touching are simple but effective ways to prevent the spread of respiratory viruses like Nimbus.

• Improve indoor air flow: Good ventilation is critical. Open windows when possible or use HEPA filters at home and work to reduce virus particles in the air.