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<div>Herd Immunity 'Ahead of Schedule'</div>

Herd Immunity ‘Ahead of Schedule’

If a novel virus is introduced to a population, eventually enough people acquire natural immunity so that the number of susceptible people declines. When the number susceptible is low enough to prevent epidemic growth, herd immunity is said to have been reached. In the early days of the COVID-19 pandemic, some experts estimated that 70%…