New COVID Strain “Stratus”: Symptoms, risks, and what experts say
A new Covid strain, known as Stratus, is spreading rapidly in the UK, with health officials warning of rising cases and unusual symptoms. The variant, made up of XFG and XFG.3, has become one of the dominant strains in England this autumn. While experts stress there is no evidence of increased severity, the unique symptom of a hoarse or raspy voice is making headlines.
The UK Health Security Agency (UKHSA) and the World Health Organization (WHO) have both classified Stratus as a “variant under monitoring,” highlighting its rapid spread but relatively low global risk.
What Is the Stratus Variant?
The Stratus variant is part of the Omicron lineage and includes two main versions: XFG and XFG.3. UKHSA surveillance data shows that XFG.3 alone accounted for 35–40% of Covid cases in recent months.
Globally, the variant has been detected across Europe, Southeast Asia, and the Americas. WHO data indicates XFG is growing faster than many co-circulating strains, but current evidence suggests no higher risk of severe disease or hospitalisation compared to earlier Covid variants.
The Key Symptom to Watch: Hoarse Voice
One of the most distinctive signs of Stratus is a hoarse or raspy voice, setting it apart from flu or common cold symptoms. Medical experts also note:
- Sore throat and blocked nose
- Fatigue and muscle aches
- Digestive issues such as diarrhoea
- Headaches and loss of appetite
Dr Gareth Nye, a biomedical scientist from the University of Salford, explained:
“People with Stratus often report a very sore throat and hoarseness, compared with the more general cough, fever, and aches linked to earlier variants.”
The “Tripledemic” Threat: Covid, Flu, and RSV
The UK is facing a tripledemic, with Covid, flu, and RSV (respiratory syncytial virus) circulating simultaneously. NHS data shows:
- Covid cases rose from 7.6% to 8.4% in one week
- Flu infections increased from 1.1% to 1.3%
- RSV cases expected to climb as winter sets in
Symptoms of these illnesses often overlap, making it harder for the public to distinguish one from another. Experts stress the importance of vaccination to reduce risk.
READ ALSO
Will the U.S. Government Shutdown again? Inside the Trump–Congress standoff
Britain faces a silent hybrid war with Russia, warns former MI5 chief
Do Vaccines Still Work Against Stratus?
According to both UKHSA and WHO, the current vaccines remain effective at preventing severe illness and hospitalisation caused by Stratus. However, scientists are monitoring its mutations, especially in the spike protein, which could potentially help it evade antibodies.
Dr Jamie Lopez Bernal from UKHSA urged eligible people to get their winter boosters:
“Vaccination offers the best protection against flu, Covid-19, and RSV. Now is the time to come forward before cases rise further in winter.”
What To Do If You Develop Symptoms
If you develop respiratory symptoms such as fever, cough, or hoarseness, health guidance is to:
- Stay home if unwell and avoid contact with vulnerable people
- Wear a well-fitting mask if you must go out
- Wash hands regularly and cover mouth/nose when sneezing or coughing
- Book a vaccine if eligible via the NHS website
Comprehensive FAQ: New Stratus Covid Strain
What is the new Stratus Covid strain?
Stratus is the name given to a new Covid lineage (XFG and XFG.3) spreading in the UK. It is part of the Omicron family.
What are the unique symptoms of Stratus?
The standout symptom is a hoarse or raspy voice, alongside sore throat, blocked nose, fatigue, and digestive issues.
Is Stratus more dangerous than other variants?
Current data shows no evidence of increased severity or higher hospitalisation rates compared to previous strains.
How common is Stratus in the UK?
UKHSA data suggests that over one-third of new Covid cases are linked to Stratus variants, making it dominant in circulation.
Do vaccines protect against Stratus?
Yes. WHO and UKHSA confirm vaccines still provide strong protection against severe illness, though monitoring continues for possible immune evasion.
What is the tripledemic?
The term describes the simultaneous circulation of Covid, flu, and RSV, which can strain healthcare systems.
How can I tell if it’s flu or Stratus Covid?
Both illnesses share symptoms, but a hoarse voice and sore throat are more strongly linked to Stratus than to flu. Testing is the only way to confirm.
What precautions should people take?
Stay home when ill, avoid crowded spaces, wear masks if necessary, and get vaccinated for both Covid and flu.
Where has Stratus been detected globally?
Stratus has spread across Europe, Southeast Asia, and the Americas, though risk levels remain low.
Could Stratus replace existing Covid strains?
Experts say XFG is growing faster than other strains, suggesting it may become dominant in circulation this winter.