American passengers from a cruise ship plagued by a deadly virus have returned to the U.S. as health officials around the world race to contain the outbreak. Several sick passengers were evacuated, and five have now tested positive for the disease. A flight attendant has also been hospitalized with possible symptoms, raising concerns she may have contracted the virus from a passenger recently off the ship. We speak with an American doctor still trapped on board and examine the growing response as Americans across five states are being monitored for possible exposure. Health officials are facing mounting questions about whether those affected are being properly quarantined and what the public needs to know about how the virus spreads. For more context and news coverage of the most important stories of our day, click here: nbcnews.com » Subscribe to NBC News: nbcnews.to/SubscribeToNBC » Subscribe to Here's the Scoop podcast: nbcnews.com/heres-the-scoop-da...