Why scientists need to learn more about how COVID-19 behaves within a human body

How much do we know about COVID-19, the virus spreading misery across the globe? Dr. Siddhartha Mukherjee joins Jeffrey Brown to discuss understanding the dynamics of the virus within people it has infected, why some experience much more severe forms of illness than others, how we can limit asymptomatic transmission and the need to buy medical researchers time to develop treatments. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: Facebook: http://www.pbs.org/newshour Twitter:   / newshour   Instagram:   / newshour   Snapchat: @pbsnews Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe