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A study from the University of Oxford has warned that the Pfizer Covid-19 vaccine becomes significantly less effective against the Delta variant just four months after the second dose - although it still offers some protection.
The study, published last week, makes the case for administering booster shots of the vaccine to keep efficacy high.
It found the efficacy of the Pfizer vaccine against symptomatic infection falls significantly within 90 days of receiving a second dose to about 75 per cent against the Delta variant.
This is down from 85 per cent effectiveness within the first fortnight of the second dose.
More at https://www.nzherald.co.nz/nz/covid...onths-study-shows/AGBRK5LJDG5NYLBJEZPHPPHMDU/
The study, published last week, makes the case for administering booster shots of the vaccine to keep efficacy high.
It found the efficacy of the Pfizer vaccine against symptomatic infection falls significantly within 90 days of receiving a second dose to about 75 per cent against the Delta variant.
This is down from 85 per cent effectiveness within the first fortnight of the second dose.
More at https://www.nzherald.co.nz/nz/covid...onths-study-shows/AGBRK5LJDG5NYLBJEZPHPPHMDU/
