What Happened Today: WHO Warns All Countries To Remain On High Alert Dr. Helen Boucher, chief of the infectious diseases department at Tufts Medical Center, answers listener questions about the COVID-19 death toll.

What Happened Today: WHO Warns All Countries To Remain On High Alert

What Happened Today: WHO Warns All Countries To Remain On High Alert

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Dr. Helen Boucher, chief of the infectious diseases department at Tufts Medical Center, answers listener questions about the COVID-19 death toll.