In the first few years of the pandemic there was a term that gave many people hope, 'herd immunity.'

So KCBS Radio's Megan Goldsby asks - did we end up reaching it?

<p>In the first few years of the pandemic there was a term that gave many people hope, 'herd immunity.'</p>
<p>So KCBS Radio's Megan Goldsby asks - did we end up reaching it?</p>

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