Canada has confirmed its first human case of bird flu after a teenager tested positive for the virus, according to health authorities.

The teenager, from the western province of British Columbia, is believed to have caught the H5 avian flu from a bird or animal, said a statement by the province on Saturday. The infected person is undergoing treatment at a children’s hospital.

The province said it was tracing the teenager’s contacts to pinpoint the source of the contagion.

“This is a rare event,” British Columbia Health Officer Bonnie Henry said in a statement. “We are conducting a thorough investigation to fully understand the source of exposure here in BC.”