Dr. Anthony Fauci, who is the director of the National Institute of Allergy and Infectious Diseases, explains what a pandemic is and says we're nearly at the brink of one with the novel coronavirus outbreak.
CNN Senior International Correspondent Ivan Watson talks to Hong Kong residents about what it is like to live in a city in the midst of the novel coronavirus outbreak.
CNN's Dr. Sanjay Gupta examines some of Sen. Bernie Sanders' medical records, in regards to a recent heart attack Sanders faced leaving some skeptical about his health for potential presidency.
Netflix series "Stranger Things" and actor Gaten Matarazzo are getting credit for raising public awareness of cleidocranial dysplasia, or CCD.
More than 300 Americans quarantined on the Diamond Princess cruise ship for almost two weeks finally head home, but their journey back to the US has been riddled with one ordeal after another. CNN's Will Ripley has more.