The first big peer-reviewed real-world study of the Pfizer vaccine has confirmed it is very effective at preventing serious illness or death - even after one dose.
The first big peer-reviewed real-world study of the Pfizer vaccine has confirmed it is very effective at preventing serious illness or death - even after one dose.
GCHQ has said it believes it can use artificial intelligence (AI) to help expose disinformation attacks by hostile foreign states trying to undermine the UK's democracy.
