London, UK, 15 December 2021: The NHS covid app warns the owner to self-isolate for 6 days after coming into contact with a coronavirus case. People who are fully vaccinated do not have to self-isolate unless there is a specific instruction that the case they came into contact with the omicron variant. Anna Watson/Alamy Live News

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Photo credit: © Anna Watson / Alamy / Afripics
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