Second shots of Covid vaccine could be delayed further in England
by Ian Sample and Sarah Boseley from on (#5CS1S)
Some evidence suggests spacing vaccination doses improves effectiveness
Second shots of coronavirus vaccine could be delayed even further amid growing evidence that spacing out the doses improves their effectiveness.
The NHS vaccination programme aims to immunise about 14 million people at greatest risk of Covid by mid-February, with second doses to be given up to 12 weeks later.
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