Covid XFG, labeled as the 'stratus' variant, has emerged as the most dominant COVID-19 strain in the UK. It is a descendant of the Omicron variant, first identified in January 2025. Several reports indicate that its prevalence is increasing rapidly. The World Health Organization has categorized Covid stratus as 'under monitoring' due to its potential for additional immune evasion. This strain is one of seven variants receiving heightened scrutiny as global health experts prepare for upcoming COVID-19 surges.
The new COVID-19 variant known as Covid XFG or 'stratus' has become the most prevalent strain in the UK, according to the UK Health Security Agency.
Covid stratus is a descendant of the Omicron variant and first detected in January 2025; it is associated with additional immune evasion.
The World Health Organisation is closely monitoring Covid stratus due to a rapid increase in cases worldwide, alongside other variants.
Covid stratus is classified as 'under monitoring' by the WHO, indicating concerns about its potential impacts during upcoming seasonal surges.
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