Health officials in Metro Vancouver say two new cases of measles have been confirmed, bringing the total number of recent cases to four.

Officials confirm a student at Carver Christian High School in Burnaby, B.C. has tested positive for the illness.

The student was on the same Air China flight that landed in Vancouver on March 21 with two people who tested positive for the disease.

Fraser Health is holding an immunization clinic at Carver Christian school today, according to medical health officer Dr. Michelle Murti.

"Because the student was at the school on March 30th, we are recommending the school review their immunizations and get caught up if they're not immunized," said Murti.

Details about the other case have not been released, but officials confirm it was a person who was on the same flight.

Murti said the incubation period for measles can be up to three weeks, meaning there could be more cases.

"It's one of those illnesses that can start a bit more suddenly. People may just have a bit of fever, cough and runny nose, and not until a few days later does that typical measles rash come out," said Murti.

While measles is rare in Canada, non-immunized people are at risk of contracting the viral infection.

Individuals born before 1957 are considered immune and do not need a vaccine, but those born betwee‎n 1957 and 1970 should have one dose and those born after 1970, should have two doses of measles-containing vaccine.