'Herd immunity is an elusive concept and doesn't apply to coronavirus,' says Dr. Don Milton at the University of Maryland School of Public Health.
Experts say it's not likely that the highly transmissible variant — or any other variant — will lead to herd immunity.
For example, herd immunity against measles requires about 95% of a community to be immune. Early hopes of herd immunity against the coronavirus faded for several reasons. Then there's the huge variation in vaccinations. In some low-income countries, less than 5% of the population is vaccinated. Rich countries are struggling with vaccine hesitancy. And young children still aren't eligible in many places.
Populations are moving toward"herd resistance," where infections will continue, but people have enough protection that future spikes won't be as disruptive to society, Milton says.
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