The Tennessee Department of Public Health is in the process of contacting as many as 600 people – including some in Alabama – potentially exposed to the measles by an infected east Tennessee man.

Health officials said the unvaccinated man traveled to Hattiesburg, Mississippi April 9-11 before stopping in Alabama on April 11. While in Alabama, he stopped at a gas station in Livingston and a Chick-fil-A restaurant in Fort Payne.

Officials in Tennessee are asking those they contact if they have experienced measles symptoms and offering them vaccinations if they are unsure if they are immune, the Knoxville News reported. The notifications turned up no cases “that we weren’t already expecting,” said Elizabeth Heart, TDPH associate director of communicators and media relations.

Four additional cases of measles, all linked the original source, have also been reported in Tennessee. The cases are part of a larger national outbreak that includes more than 700 cases in 22 states.

The Alabama Department of Public Health urged anyone who believed they could have been exposed to call their healthcare provider and isolate themselves if they developed symptoms of measles. Symptoms include a high fever, cough, runny nose, red or watery eyes, followed by white spots in the mouth and a red, spotty rash that typically begins on the face and spreads over the body.

ADPH has 32 open measles investigations. State officials confirmed the first case of the virus in Alabama on May 2.

Symptoms can develop any time in the 21 days following exposure to the illness. Measles is fatal in one to two out of every 1,000 cases.

The Centers for Disease Control has confirmed more than 700 cases of measles, a disease all but eliminated in the U.S. in 2000, since the start of the year. The virus has been reported in 22 states. Measles outbreaks linked to unvaccinated international travelers are ongoing in New York state and New York City; Michigan; New Jersey; California, including Los Angeles and Sacramento counties; Georgia; and Maryland.