As New Virus Spreads From China, Scientists See Grim Reminders

Less than a month after the first few cases of a new respiratory illness were reported in Wuhan, China, travelers have carried the virus to at least four other countries, including the United States. More than 400 people have been infected, at least 17 have died -- and the world is bracing itself for what might come next.On Wednesday, experts at the World Health Organization will meet to decide whether to declare the outbreak a "public health emergency of international concern," a label given to