Studies on vaccine effectiveness are ‘promising’

While new studies on Covid-19 vaccine effectiveness weren’t large enough to be completely conclusive, they are “very promising and in line with what we hoped for from the trials,” says Professor Andrew Hayward (UCL Epidemiology & Health).

Listen: BBC World Service’s ‘Newshour’ (from 3 mins 13 secs), More: BBC Radio 4’s ‘World at One’ (from 16 mins 59 secs)