Up until last week, official guidance suggested that presumptively healthy people didn't need to be wearing masks. Now, that has changed. In this episode, CNN Chief Medical Correspondent Dr. Sanjay Gupta explains the new recommendations.

After spending a year in space, Scott Kelly is an expert on managing extreme isolation. The retired astronaut shares valuable advice with CNN Chief Medical Correspondent Dr. Sanjay Gupta on how to cope with social separation here on earth.

How do you stay at home if you are homeless? CNN Chief Medical Correspondent Dr. Sanjay Gupta looks at how cities across the U.S. are handling the homeless crisis during the coronavirus pandemic and why everyone's health matters.