spread

As more community transmission occurs, contact tracing becomes that much more difficult.

School letters sent home from Florida to California seek to assure parents the risk is still very low.

Researchers are still at least a year away from having a vaccine ready for widespread use.

President Moon Jae-in of South Korea is warning his country is at a turning point in containment efforts.

The new case announced Thursday is the sixth in the United States.

Park fisheries supervisor Todd Koel says park officials want to keep the invasive species from spreading to the park and to the Columbia River Basin.