A new variant of Covid, known as Arcturus, has been confirmed in the UK.
It comes after a recent surge in cases in India forced parts of the country to bring back compulsory face mask rules.
The Omicron sub-variant XBB.1.16 - which was first identified on January 23 this year - has caught the attention of experts around the world. So far, it has been detected in at least 22 countries.