A new strain of Covid with a distinct symptom is circulating across the UK.
The new Covid variant called Stratus includes two sub-variants XFG and XFG.3.
By 10 September, the UK Health Security Agency (UKHSA) recorded a 7.6% increase in coronavirus cases across England compared to the previous week, though it's unclear how many are connected to the XFG variant.
While the data shows an increase in new infections, medical experts have assured that viral mutations are a normal occurrence.
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“It is normal for viruses to mutate and change over time,” Dr Alex Allen, consultant epidemiologist of the UK Health Security Agency (UKHSA).
What is ‘Stratus’ XFG and XFG.3?
The World Health Organisation has classified the XFG as a 'variant under monitoring' and assessed the additional public health risk it poses as low globally.
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According to current evidence, the WHO clarified that this variant doesn't cause more severe illness or deaths than other circulating variants.
“Based on the available information so far, there is no evidence to suggest that the XFG and XFG.3 variants cause more severe disease than previous variants, or that the vaccines in current use will be less effective against them,” said Dr Allen from the UKHSA.
What are the symptoms of Stratus Covid strain?
Some experts have claimed that Stratus can give patients a 'hoarse voice' or a 'razor blade' sore throat. This comes as new Covid variants continue spreading nationwide, with Nimbus causing severe razor-blade-like sore throats last month.
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The WHO stated: “XFG is growing rapidly compared to co-circulating variants globally. However, XFG exhibits only marginal additional immune evasion over [other variant] LP.8.1.
"While there are reported increases in cases and hospitalisations in some of the [southeast Asia region] countries, which has the highest proportion of XFG, there are no reports to suggest that the associated disease severity is higher as compared to other circulating variants.
What to do if you have symptoms?
If you're experiencing symptoms and must go out, health officials recommend wearing a face covering. Regular handwashing and properly disposing of used tissues in bins can help prevent the spread.
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For sore throat relief, the NHS suggests staying well-hydrated and trying a teaspoon of honey to provide some comfort.
Do the Covid vaccines work against new strains?
As per the current evidence, the WHO said approved Covid vaccines should remain effective against Stratus in preventing symptomatic and severe disease.
The organisation noted that the risk of vaccine evasion is low, although additional laboratory studies are needed to assess the potential for antibody escape. That said, some health experts have warned that Stratus could also evade immunity from vaccinations.
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“Unlike other variants, Stratus has certain mutations in the spike protein which could help it evade antibodies developed from prior infections or vaccinations,” noted Dr. Kaywaan Khan, Harley Street GP and founder of Hannah London Clinic.