Covid vaccine: AstraZeneca updates US vaccine efficacy results
The vaccine-maker slightly downgrades its efficacy rate as it awaits US regulatory approval.
from BBC News - World https://ift.tt/3reWFOg
https://ift.tt/3reWFOg
from BBC News - World https://ift.tt/3reWFOg
https://ift.tt/3reWFOg
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