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approved (96 อ่าน)
7 ก.พ. 2565 18:33
The AstraZeneca - or AZ for short - vaccine was approved in the UK and EU for older adults before firm evidence showing it protected them from Covid. The trials demonstrated it protected younger volunteers. But the older adults had been recruited later. Their blood samples showed the vaccine produced a very strong immune response to coronavirus - just as it did in younger volunteers.
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