![](https://images.news18.com/ibnlive/uploads/2020/07/1595612567_news18_world_default_image.jpg)
British health officials greenlighted the AstraZeneca and Oxford COVID19 shot on Wednesday but also rebuffed one of their central claims: that a halfdose followed by a standard dose offered more protection against infection.
from Top World News- News18.com https://ift.tt/2L8Pgk0
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