Respirologist Dr. Samir Gupta breaks down what is known about the coronavirus delta variant, including what makes it different, how dangerous it is and whether vaccines protect against it.
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The National is CBC’s flagship nightly news program, featuring the day’s top stories with in-depth and original journalism, with hosts Adrienne Arsenault and Andrew Chang in Toronto, Ian Hanomansing in Vancouver and the CBC’s chief political correspondent, Rosemary Barton in Ottawa.