Pfizer vaccine effectiveness against Delta falls after three months, study shows
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It also showed that the Pfizer vaccine is initially more effective than the AstraZeneca vaccine. However, about four months after the second dose, the Pfizer jab's efficacy wanes to the point where AstraZeneca's vaccine become the more effective of the two.


https://www.nzherald.co.nz/nz/covid-19-c...ZPHPPHMDU/
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