Health officials in Montgomery County are investigating and contact tracing after a child was diagnosed with measles.

SEMINOLE, Texas — When the local hospital warned of a brewing measles outbreak, Kaleigh Brantner urged fellow residents of this rural West Texas community to beware of vaccinating their children.

The Pennsylvania case is one of 164 across nine states this year as of Thursday, according to the CDC’s most recent data.

The King County infant, diagnosed with measles after recent overseas travel, may have exposed others at several locations around the Puget Sound region, including Seattle Children's, Bellevue Square ...