The Fraser Health Authority is holding an immunization clinic at a Burnaby high school Thursday after another student came down with a case of the measles.
Two other teens tested positive last week, and Vancouver Coastal Health says a fourth case of measles have now been diagnosed.
All were on the same flight from China returning from a spring break school trip.
Medical Health Officer Dr. Michelle Murti says the student attends Carver Christian.
“The student started having symptoms from last week, so this student had been part of the Air China flight, so this is associated from the March 21, the two cases we had reported last week, so were known to public health, and had been followed by public health appropriately.”
Murti adds the incubation period is 8-21 days.
“Which is why people who were exposed on that flight had been followed up by public health, but may still be becoming symptomatic with measles infection now, so we are making sure people are people followed if you have been exposed on that flight.”
Late last month, health officials said one boy and one girl were diagnosed with the highly contagious disease shortly after returning from a school trip over spring break.
Measles can have serious complications like inflammation of the brain and brain damage, convulsions and deafness can result.