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Brazil COVID-19 deaths surge as variant rages
So, researchers in Israel are trying to address that. Their study has become the first to test a vaccine s effecacy against different variants in real-world settings.
Professor Adi Stern of the Shmunis School of Biomedical and Cancer Research of Tel Aviv University was part of the team of researchers who conducted the study.
In an email to DW, Stern said she and her colleagues had found real world evidence for reduced effectiveness of the Pfizer-BioNtech vaccine against particular variants in specific time windows post vaccination.
From slightly concerning to reassurance
The researchers matched vaccinated and unvaccinated people, according to age, biological sex, ethnic group and location. That was to ensure the most valid comparison possible.
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