In a health advisory, Alberta Health Services has confirmed a single case of measles in Edmonton, the first such case in the city in two years, and are advising of potential exposures.

Individuals who were at two locations on Edmonton's west end on March 25 or 26, 2014 may have been exposed.

AHS says that people who were at the West End Registries, located at 10011 - 170 St, between 7:40 a.m. and 10:00 p.m., and at Callingwood Safeway, 6655 - 178 St, between 8:30 p.m. to 10:50 p.m. on March 25 may have been exposed.

Additionally, Edmontonians may have been exposed if they were at the West End Registries on March 26, between 7:40 a.m. and 8:40 p.m.

Individuals who have not had measles or have not received two doses of measles vaccine may be at risk, says AHS.

Sources told CTV News that a male employee at the registry was confirmed to have the virus, and he was not vaccinated – it’s believed he contracted the virus in Edmonton, and officials said that means there could be other cases that have not yet been confirmed.

If you were at either of these locations during the times indicated, you're advised to monitor yourself for symptoms of measles. If symptoms do develop, you're advised to stay home and call Health Link Alberta, 1-866-408-5465, before you visit a doctor or health care facility.

“Measles has the highest potential for transmission, measles transmits very effectively from someone who is infectious to a susceptible individual or person who is not protected,” AHS Medical Officer of Health Dr. Chris Sikora said.

Symptoms of Measles include: fever of 38.3°C or higher, cough, runny nose and/or red eyes, red blotchy rash that appears three to seven days after fever starts, beginning behind the ears and on the face and spreading down to the body and then to the arms and legs.

Officials also said the illness comes with a few serious complications – statistics show 1 in 20 patients will develop pneumonia, and 1 or 2 out of every 1,000 cases are fatal.

Meanwhile, two new cases of measles were confirmed Thursday in Calgary – CTV News has learned both patients are students at Western Canada High School in that city.

Those two cases are linked, but officials said neither is travel-related.

AHS said so far in 2014, there have been nine confirmed measles cases in Alberta, including the one case in Edmonton.

Last year, on October 18, 2013, Alberta Health Services declared a measles outbreak - with 42 measles cases were confirmed in southern Alberta. The outbreak was officially declared over on January 6.

Dr. Sikora told CTV News it’s hoped the latest cases will boost the province’s measles immunization rate.

“[The immunization rate] is likely somewhere between the 70 or 80 percent range, which is not ideal,” Dr. Sikora said. “To have adequate protection for an environment, herd immunity, or the ability to stop sustained transmission within populations, we like to have that immunization rate as high as 95 or 98 percent.”

With files from Veronica Jubinville