Pfizer vaccine effectiveness declines faster than AstraZeneca, study shows
Researchers said that jabs still remain the most effective way to ensure protection against the Delta variant
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Pfizer vaccine effectiveness declines faster than AstraZeneca, study shows
Wales Online
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Effectiveness of Pfizer Covid vaccine declines faster than AstraZeneca, study finds
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But experts found that the level of protection provided by both vaccines after four to five months remained the same.
