The U.S. is expanding use of Pfizer's COVID-19 vaccine to children as young as 12.
Study: People Infected With Coronavirus May Make Antibodies For Years
WBZ CBS Boston
Dr. Mallika Marshall looks at a new study on coronavirus antibodies.
Dr. Mallika Marshall: Pfizer Shot Authorized For Kids Is 'Great News'
Credit: WBZ CBS Boston
Duration: 02:13s
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