• Herd immunity in the US could be around the corner - but maintaining it is likely to be a perpetual battle

    7 days ago - By Business Insider

    Kristine Ko, right, waits in line for her vaccine in Los Angeles on April 8, 2021.
    Al Seib/Los Angeles Times/Getty Images
    The US could reach herd immunity in a matter of weeks or months, but the metric is a moving target .
    Vaccines bring the US closer to that goal. More contagious variants make it harder to reach.
    Maintaining herd immunity could require annual booster shots .
    See more stories on Insider's business page .
    Scientists want you to know that the threshold for herd immunity isn't a single, static number. But it isn't an unattainable goal , either. Many experts believe the US is...
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