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Herd immunity: What is it, will it help us get out of Covid-19? Wall Street Journal

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We know that Covid19 spreads through close contact, making crowded areas potentially deadly. But when some members of a crowd are immune, that begins to change. This is called herd immunity. It's what's protecting much of the population from diseases like measles and polio, and it's what's driving vaccine efforts today. Listen to the experts explain herd immunity, in this piece courtesy of BizNews partner Wall Street Journal. Learn more about your ad choices. Visit megaphone.fm/adchoices
30 Jul 2020 7AM English South Africa Investing · Business News

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