Louisville officials said Tuesday that a second case of the measles was recently diagnosed in Jefferson County.

The measles virus can remain in the air for up to two hours after an infected person leaves an area.

Mayor Craig Greenberg's office said the health department learned an individual infected with measles visited the Little Clinic inside the Kroger at 4915 Dixie Highway.

Louisville Mayor Craig Greenberg said of the other 12 active cases in Kentucky, 11 of the people were unvaccinated.