Efficacy of Pfizer/BioNTech Coronavirus Vaccine Drops to 84pc after 6 Months

Society » HEALTH | July 29, 2021, Thursday // 12:33
Bulgaria: Efficacy of Pfizer/BioNTech Coronavirus Vaccine Drops to 84pc after 6 Months pixabay.com

The efficacy of the Pfizer/BioNTech coronavirus vaccine fell from 96% to 84% after six months, a new preprint report by medRxiv showed on Wednesday.

"Efficacy peaked at 96.2 percent during the interval from 7 days to <2 months post-dose 2, and declined gradually to 83.7 percent from 4 months post-dose 2 to the data cut-off, an average decline of ~6 percent every 2 months," the report said. Ongoing follow-up is needed to understand the persistence of the vaccine effect over time, it added.
According to data that has not been reviewed, the vaccine was initially 91% effective at preventing COVID-19 over the course of six months.

The US health-oriented news outlet Stat suggested that if the vaccine efficacy keeps declining at the rate described in the study, it will end up being less than 50% within 18 months from the date of vaccination and so a third dose would be required. (ANI/Sputnik)

We need your support so Novinite.com can keep delivering news and information about Bulgaria! Thank you!

Health » Be a reporter: Write and send your article
Tags: vaccine
Advertisement
Advertisement
Expats.bg All Are Welcome! Join Now!
Bulgaria news Novinite.com (Sofia News Agency - www.sofianewsagency.com) is unique with being a real time news provider in English that informs its readers about the latest Bulgarian news. The editorial staff also publishes a daily online newspaper "Sofia Morning News." Novinite.com (Sofia News Agency - www.sofianewsagency.com) and Sofia Morning News publish the latest economic, political and cultural news that take place in Bulgaria. Foreign media analysis on Bulgaria and World News in Brief are also part of the web site and the online newspaper. News Bulgaria