New Jersey health officials are warning residents of Legionnaires' disease and measles cases around the state.

They say 22 cases of Legionnaires' have been reported in Union County. Legionnaires' is caused by breathing in water droplets containing Legionella bacteria.

The outbreak started in March. Since then, health officials say five people have died.

They say the five people who died had pre-existing conditions. Officials say the patients were infected between March 8 and May 13.

The CDC says it's investigating. Health officials say there is no threat to the general population.

State and local officials are also reportedly considering a no-fly list to prevent measles from spreading. Hundreds of cases have been reported around the country.

Most of those reports are from international travelers.

The state Department of Health says travelers at Newark Liberty Airport may have been exposed to measles. An international traveler infected with measles arrived at terminal B on May 8.

They say any travelers at the terminal from 2 p.m. to 6 p.m. may be at risk.