BOSTON (CBS) – Anyone who rode the Boston Express, bus #5178, from 8:30 p.m.-midnight Tuesday may have been exposed to measles.

An international traveler who rode a bus from South Station to Manchester, New Hampshire, has now been diagnosed with measles, the New Hampshire Division of Public Health Services confirmed.

The bus left Boston Logan International Airport at 9:25 p.m. with passengers on board and then picked up the infectious traveler and others at 10 p.m. at South Station in Boston. The bus made stops to drop passengers in Tyngsboro at 10:45 p.m.; Nashua, New Hampshire, at 11 p.m.; and arrived in Manchester, New Hampshire, at 11:30 p.m.

According to the Boston Public Health Commission, anyone who was at any of the following locations on Tuesday, February 26 may have been exposed:

4-8:30 p.m.: Greyhound Bus (#2520) from New York City to Boston.

Greyhound Bus (#2520) from New York City to Boston. 8:30 p.m.-midnight: South Station Bus Terminal, Boston.

South Station Bus Terminal, Boston. 10-11:30 p.m.: Boston Express Bus (#5178) from Boston Logan Airport to Manchester, New Hampshire.

Passengers at the South Station Bus Terminal were a little uneasy after the announcement Friday afternoon.

“I don’t know how to feel about coming through here with the measles,” Tajah Bailey said.

“While this gentleman is on the bus anybody who would have been on the bus may be exposed,” said Jennifer Leafjaeger, the Director of Population Health for the Boston Public Health Commission.

Measles is an airborne virus and health officials say the time for possible exposure at the Bus Terminal was from 8:30 to midnight.

“What airborne means is that the infectious organism in this case a virus actually stays in the air after a person leaves for up to two hours,” she explained.

“I hope I had the vaccine for the measles but I’m kind of scared I guess,” Tajah Bailey said.

If you have had both recommended doses of the measles vaccine, or have had the measles before doctors say you are not at risk.

Symptoms could show two to three weeks from exposure.

“For the most part it can be fever cough runny nose and red eyes and then a couple days later you will start with a red rash,” Leafjaeger said.

If you experience any of these symptoms, call your health care provider right away.