Canada Confirms First-Ever Case of Andes Hantavirus After Antarctic Cruise Exposure

Canadian health authorities have confirmed the country’s first documented case of Andes hantavirus, a rare and potentially serious viral illness, in a Yukon resident who was among a group of travellers exposed to the pathogen aboard an Antarctic cruise ship.

The Public Health Agency of Canada (PHAC) announced the confirmation Sunday after the National Microbiology Laboratory in Winnipeg completed testing on a sample initially flagged as presumptive-positive the day before.

The situation began drawing public health attention earlier this week when the World Health Organization identified the specific hantavirus strain circulating among passengers of an Antarctic cruise as the Andes variant a designation that set off alarm bells among infectious disease experts. Unlike the more common forms of hantavirus, which spread almost exclusively through contact with infected rodent droppings or urine, the Andes strain is uniquely capable of spreading from one person to another.

Four Canadians who had been identified as having high-risk exposure were brought to British Columbia and placed in isolation. Among them, the Yukon resident began showing mild symptoms including fever and a headache roughly two days before Saturday’s announcement by B.C. Provincial Health Officer Dr. Bonnie Henry.

The patient and their partner were subsequently transferred to a hospital in Victoria for observation and further testing. By Sunday, PHAC confirmed what officials had been bracing for: the Yukon resident’s result was positive. In better news, the partner tested negative.

The situation remains fluid, with health authorities tracking several groups of individuals across the country.

Of the original four high-risk travellers brought to British Columbia, a third has since been admitted to hospital a precautionary move rather than a response to confirmed illness, health officials stressed. The fourth individual continues to isolate at home.

Beyond that immediate group, nine Canadians in total are classified as having had high-risk exposure. They are spread across Ontario, Alberta, and British Columbia, and all are isolating under close public health supervision. An additional 27 people elsewhere in the country are being monitored after sharing flights with a confirmed case, though they are not considered close contacts based on their seating arrangements.

As of Sunday, no new infections have been identified.

The day’s developments weren’t without a tense moment at the hospital level. Island Health Medical Health Officer Dr. Charmaine Enns disclosed that an “inappropriate laboratory control procedure” had occurred Sunday at Royal Jubilee Hospital involving a blood sample from the infected patient.

As a precaution, laboratory staff were briefly held on-site while a risk assessment was conducted, and lab tests were temporarily redirected off-site. A multi-disciplinary team drawing on infection prevention, public health, laboratory, and operations expertise alongside the B.C. Centre for Disease Control conducted a thorough review and determined that no staff had been exposed.

Dr. Enns was careful to explain why: hantavirus does not transmit through blood. The virus spreads through infected saliva or urine, not through the kind of blood samples routinely handled in hospital laboratories. Staff involved will receive additional education on sample collection and handling protocols.

“Our sites remain safe places to visit and seek care,” Enns said in a statement.

Despite the gravity of confirming a first-of-its-kind case in Canada, public health officials were measured in their response, emphasizing that the overall risk to the general public remains low a position echoed by the WHO earlier this week.

Dr. Joss Reimer, Canada’s Chief Public Health Officer, praised the coordination between federal and provincial health bodies and highlighted the role of the travellers themselves.

“We want to thank public health authorities and front-line staff in British Columbia for the dedicated care that they are providing and for their ongoing management of the situation, and the passengers for their cooperation with public health direction to help keep others safe,” Dr. Reimer said.

Authorities say they will continue to closely monitor all individuals under watch and will provide updates as the situation develops.