Health
Covid: How will we know if the vaccine is working? – BBC News
Deaths are falling faster for the over-80s – but does that mean the vaccine is working?
By Maryam AhmedBBC News
More than 15 million people in the UK have received a first dose of coronavirus vaccine – but how will we know if it’s working?
There are some early signs of a possible vaccine effect in falling deaths among people aged over 80.
But data on cases and hospital patients is not so clear.
It is hard to separate the effect of the vaccine from that of lockdown.
So the government will review other data before deciding on easing restrictions.
BBC News analysis, using data from…
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