What is new ‘Stratus' Covid variant? Symptoms as cases grow in UK
The new strain, called Stratus, has two variants, XFG and XFG.3, with XFG.3 accounting for 30 per cent of cases in the country.
Unlike other strains, some experts have suggested the Stratus variant is known for its unique symptom of giving people a hoarse voice.
Despite accounting for a large proportion of new cases, experts are not concerned over the spread, noting it is normal for viruses to mutate and change.
'It is normal for viruses to mutate and change over time,' Dr Alex Allen, consultant epidemiologist of UKHSA said, adding that it continues to monitor all strains of Covid in the UK.
What is 'Stratus' XFG and XFG.3?
The World Health Organisation has designated the XFG as a 'variant under monitoring' and has said the additional public health risk posed by XFG is evaluated as low at the global level.
Globally, XFG was estimated to have the highest relative growth compared to other varients currently circluated, including the recent 'Nimbus' NB.1.8.1.
Current data does not indicate that this variant leads to more severe illness or deaths than other variants in circulation, the organisation said.
What are the symptoms?
While evidence shows an increased proportion of XFG WHO has not observed any signs that it has an increase in severity.
'While there are reported increases in cases and hospitalisations in some of the [South-east 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, the WHO said.
Dr Allen from the UKHSA also noted: '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.'
It comes as new Covid variants continue to spread throughout the country, with Nimbus giving people razor-blade like sore throats last month.
Some experts have claimed Stratus can give patients a 'hoarse voice.'
What are the risks around XFG?
The WHO have designated XFG as a 'low risk' globally.
It said: 'XFG is growing rapidly compared to co-circulating variants globally. However, XFG exhibits only marginal additional immune evasion over [other varient] LP.8.1. While there are reported increases in cases and hospitalizations in some of the [South-east 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.
'The available evidence on XFG does not suggest additional public health risks relative to the other currently circulating Omicron descendant lineages.'
Do the Covid vaccines work against NB.1.8.1?
Based on available evidence the WHO said the current approved Covid-19 vaccines are expected to remain effective to this variant against symptomatic and severe disease.
The organisation said the current data suggests the risk of vaccine evasion is low, however additional laboratory studies are needed to further assess the risk of antibody escape.
However, some experts have warned Stratus could also evade immunity from jabs.
'Unlike other variants, Stratus has certain mutations in the spike protein which could help it evade antibodies developed from prior infections or vaccinations,' Dr Kaywaan Khan, Harley Street GP and founder of Hannah London Clinic told Cosmopolitan UK.
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