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The world may never reach herd immunity against Covid-19
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Covid-19 surged last year, governments worldwide touted the hope of “herd immunity," a promised land where the virus stopped spreading exponentially because enough people were protected against it.
That’s now looking like a fantasy. The thinking was that the pandemic would ebb and then mostly fade once a chunk of the population, possibly 60% to 70%, was vaccinated or had resistance through a previous infection.
But new variants like delta, which are more transmissible and been shown to evade these protections in some cases, are moving the bar for herd immunity near impossibly high levels.
Delta is spurring widening outbreaks in countries like the U.S. and U.K. that have already been walloped by the virus, and presumably have some measure
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COVID-19
United States
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Cases: 46 252 513
Deaths: 750 423
Recovered: 0
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India
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Cases: 34 321 025
Deaths: 459 652
Recovered: 0
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Brazil
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Cases: 21 835 785
Deaths: 608 235
Recovered: 0
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United Kingdom
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Cases: 9 215 683
Deaths: 141 607
Recovered: 0
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Russia
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Cases: 8 494 589
Deaths: 237 619
Recovered: 0
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