Some health experts suggest 'herd immunity' may be needed to combat COVID-19
When the majority of a population contracts a virus and naturally overcomes it, a 'firebreak' is created; William La Jeunesse reports.
Some health experts suggest 'herd immunity' may be needed to combat COVID-19
Some health experts suggest 'herd immunity' may be needed to combat COVID-19
When the majority of a population contracts a virus and naturally overcomes it, a 'firebreak' is created; William La Jeunesse reports.
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