Toronto Public Health says a person infected with measles may have inadvertently exposed others to the illness at North York General Hospital last week.

The person visited the hospital three times -- on May 13, May 16 and again on May 17 -- and was in the:

  • Emergency room
  • Ultrasound room waiting area
  • Main cafeteria

Hospital officials are trying to contact people who may have been exposed. However, those who were at the facility on those days and want to be checked out are asked to call Toronto Public Health at 416-338-7600.

The public agency says the North York case is connected to the ongoing measles outbreak in the Greater Toronto Area, which began in March.

So far, 15 cases have been confirmed and a number of others are being investigated.

Although officials call it an outbreak, the risk of infection is considered low because of high immunization rates.

Measles is a highly contagious disease spread through coughing, sneezing or talking, and direct contact with nasal or throat secretions.

A person with measles is contagious three to five days before the rash appears, until approximately four days after.

Signs and symptoms of measles include fever, cough, runny nose and red, burning, watery eyes. Other symptoms include white spots on the inner lining of the mouth and a rash that starts on day three-to-five of the illness and can last up to six days.