Alberta Health Services has issued a measles exposure alert for the Alberta Children's Hospital in Calgary after a person with a confirmed case of measles visited the hospital's emergency department while infectious.

The exposure period is between 10:08 a.m. and 2:14 p.m. on July 13.

If you were in the emergency department at that time, and you were born after 1969, and you've had fewer than two documented doses of measles vaccine, health officials warn that you may be at risk for developing measles and should self-monitor for symptoms.

"Measles is an extremely contagious disease and the virus spreads easily through the air," AHS said in a statement.

Symptoms of measles include:

Fever of 38.3 C or higher; and

Cough, runny nose and/or red eyes; and

A rash that appears three to seven

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