Infectious diseases - the Black Death, the Spanish Flu, and AIDS account for over one hundred million deaths through history. When a new threat Ebola, SARS, Zika seems imminent, we send our medical personnel to contain it, protected by a thin mask, making life-and-death decisions on suspect information. Khan has found that rogue microbes will always be a problem, but outbreaks are often caused by people failing to imagine the consequences of our actions....

Throughout history, humankind's biggest killers have been infectious diseases: the Black Death, the Spanish Flu, and AIDS alone account for over one hundred million deaths. We ignore this reality most of the time, but when a new threat--Ebola, SARS, Zika--seems imminent, we send our best and bravest doctors to contain it. People like Dr. Ali S. Khan.In his long career as a public health first responder-protected by a thin mask from infected patients,...

"CNN chief medical correspondent Sanjay Gupta, MD, offers an accessible, data-packed answer to our biggest questions about Covid-19: What have we learned about this pandemic and how can we prepare for--or prevent--the next one? As America's favorite frontline Covid-19 health journalist, Dr. Sanjay Gupta has barely left his primetime seat in his makeshift studio basement since the pandemic began (other than to perform brain surgery). He's had the insider...