Two new cases of measles have been identified in the Lower Mainland, according to the Vancouver coastline.
The health authority has found that one of the new cases is associated with an earlier known case of measles, but states that the source of the second infection has not been identified and investigated.
There are now 10 confirmed cases of measles associated with the current outbreak. An unrelated case of measles was detected in Vancouver earlier in February.
"I can not promise that every exposure is due," said VCH Health Officer Dr. Althea Hayden.
He says there were possible exhibitions in Vancouver, Richmond, Squamish, Whistler and Steveston.
There are other sites where people may have been exposed and the health authority has informed these people directly.
Measles are an extremely contagious disease that spreads through the air and can remain in the air for two hours. According to a statement from Vancouver's Coastal Health, it is too late for the majority of people who may have been in contact with confirmed cases to take preventive measures.
The health authority says that those at risk should monitor the symptoms.
Symptoms include fever, cough, runny nose, and red eyes, followed a few days later by a rash that begins on the face and spreads to the chest.
Thirty-six students and staff have already been invited to stay home from two French schools in Vancouver where the event started.