Local businesses have been hit hard in the past few days and, with schools closed until May 6, families are scrambling to care for their children.
Obama urges that schools with confirmed or suspected cases suspend classes. Mexican schools have already taken that step.
First US death reported in Texas; two schools shuttered in New York.
European travel warnings and canceled trips likely to hit Mexico's $13 billion a year industry.
The world's response to the outbreak shows progress and problems: Scientists have more tools, but early detection remains difficult in some places.
A Christian Science perspective.