Study finds early intervention key to blocking coronavirus spread
03:32
Share this -
copied
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.May 22, 2020
UP NEXT
Maddow: Alignment with polar opposite Liz Cheney shows seriousness of Trump threat
04:47
'A risk that we simply can't take': Why Trump's erratic lame duck raises red flags
01:56
'Dangerous and chilling': Cheney describes the moment she learned Trump's 2020 scheme
02:07
'He is not the lesser of two evils': Cheney emphasizes severity of Trump threat
01:43
Cheney warns of Speaker Johnson's willingness 'to do things he knew to be wrong' for Trump
01:40
'Wildly unconstitutional': GOP flagged Trump's election scheme in private, Cheney book reveals