Measles spread to at least 3 other states after trips to Florida

Measles cases that turned up in at least three states this year were linked to visits to Florida, federal and state investigators concluded, shedding light on some of the early infections that have fueled an uptick of the highly contagious virus.

Florida's health department thinks families of the cases earlier this year from Indiana and Louisiana may have crossed paths in the state, according to messages sent between local investigators and the Centers for Disease Control and Prevention through late February.

Louisiana previously said its first two measles cases this year in the New Orleans area had been linked to travel to another state, but declined to say which.