Study Finds Early Intervention Key To Blocking Coronavirus Spread | Rachel Maddow | MSNBC

Jeffrey Shaman, professor of environmental health sciences at Columbia University School of Public Health, talks with Rachel Maddow about how the doubling nature of the spread of coronavirus makes it crucially important to act quickly in the early stages of an outbreak before cases balloon. Aired on 5/21/2020.
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Study Finds Early Intervention Key To Blocking Coronavirus Spread | Rachel Maddow | MSNBC