The amount of coronavirus particles someone has can be an indicator of how likely they to spread the disease, but it’s not a perfect measurement. Philip Kiefer, staff writer at Popular Science magazine, spoke with Anne-Marie Green and Vladimir Duthiers on CBSN about what a patient’s viral load can show, and how the Provincetown, Massachusetts, outbreak this summer changed our understanding of the virus’ ability to spread among people who are vaccinated.
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