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Highly infectious COVID variant Stratus spreads in UK

Believed to be more contagious than earlier variants

Highly infectious COVID variant Stratus spreads in UK
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StarsInsider
04/07/2025 12:45 ‧ 6 hours ago | StarsInsider

HEALTH

Virus

A new COVID variant called "Stratus" has rapidly become the dominant strain in the UK, raising concerns among experts about a potential surge in infections.

Known scientifically as XFG, it is believed to be more contagious than earlier variants due to mutations that help it evade the immune system. One of its main symptoms is a dry, sore throat.

According to recent data from the UK Health Security Agency (UKHSA), XFG has grown from making up around 10% of COVID cases in May to nearly 40% by mid-June, confirming its swift spread across the UK.

This new variant is spreading alongside the recently discovered NB.1.8.1 variant, known as "Nimbus." While both have spread widely, the feared surge in hospital admissions has not happened. Experts say this may be one of several signs that COVID-19 is gradually becoming more mild as a disease. Could it be? Click on for more.

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