Washington state health officials have warned people who have been to Seattle-Tacoma International Airport this month. According to the officials, passengers who have visited the airport this month could have been exposed to measles virus or enveloped RNA virus of the genus Morbillivirus.

Measles virus is cause of measles, which is a highly infectious disease that can be easily spread through sneezing or coughing. Washington state health officials have said that an individual who was suffering from the disease visited Seattle-Tacoma International Airport on September 6. According to officials, the passenger was in a contagious state.

In a statement, Public Health -Seattle & King County said that the passenger was likely exposed to measles outside United States.

The agency said that the infected passenger used airport's north satellite terminal and had also dined at Courtyard Seattle Federal Way hotel.

Measles' incubation period varies between 8 to 15 days. Symptoms of the virus start showing up seven to 21 days after exposure. The agency said that the passengers who are at risk might start noticing the symptoms from September 13 to September 27.

Watery eyes, respiratory, fever and runny nose are the known symptoms of measles. Apart from that, characteristic koplik spots on the tongue are another important symptom of measles. If any traveler will notice these any of these symptoms, it is possible that the person is infected with the virus.

In the statement, Washington state health officials have advised the passengers who believe they could be at risk to seek immediate medical attention. The officials have also urged people not to visit their regular clinics as there are chances that the virus can spread to other people. Thus, those who want medical attention are advised to call for an in-house health check-up.

According to officials, the people who notice your measles symptoms must inform the clinics regarding measles symptoms so that appropriate measures can be taken.