How well does the Pfizer vaccine protect against the Delta variant? Here's what we know:
assessing the vaccine’s performance against the variant, which indicate a much higher degree of protection against infection and mild illness .
Since the researchers have not released the full data from the Israel study, it is difficult to fully assess the findings, Dr. Deepti Gurdasani, an epidemiologist at Queen Mary University in London, toldBut one potential explanation for the discrepancy is that the Israel data is just “the best we’ve got,” Dr.
The discrepancy could also be explained by flaws in how the Israeli study was conducted, Harvard Medical School Professor Rebecca Weintraub toldmeaning the higher number of cases among vaccinated people could be caused by something other than the vaccine being less effective. The study did not take the steps needed to rule out these alternate explanations—such as Israel’s surveillance program potentially picking up more cases than other studies due to most people in the highly vaccinated country only getting tested after contact with a positive case—Weintraub said, making it hard to conclude the vaccine is less effective.
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How Well Does The Pfizer Vaccine Protect Against The Delta Variant? Here’s What We KnowI am a London-based reporter for Forbes covering breaking news. Previously, I have worked as a reporter for a specialist legal publication covering big data and as a freelance journalist and policy analyst covering science, tech and health. I have a master’s degree in Biological Natural Sciences and a master’s degree in the History and Philosophy of Science from the University of Cambridge. Follow me on Twitter theroberthart or email me at rhartforbes.com
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