The outbreak of a deadly virus aboard a cruise ship may sound like a familiar story — but while it's a serious scenario, public health figures aren't anticipating the next global pandemic. The big picture: The hantavirus has left travelers isolating in their rooms, sparked a diplomatic debate about where the ship should port and launched a contact-tracing scramble. The Andes strain of the virus, which health authorities have identified as the culprit on the cruise, is the only one known to be