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Five weeks ago, the answer was yes, “because, when I looked at the data, the epidemiology in Israel, the U.K., the U.S., I said the countries that have vaccinated the most aggressively have seen the fastest declines in cases per day, and they were staying down,” said Russell, a professor of immunology and virology at Memorial University and editor-in-chief of the journal Viral Immunology.
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The Delta curve ball: How worried should Canada be about the COVID-19 variant? Back to video
Today, all three of those “three big vaccinators” are seeing an upturn in COVID driven by the Delta variant that first surfaced in India in October 2020. It’s now the globe’s most dominant strain, and an exquisitely contagious one.