Worried about hantavirus? Take precautions when opening cottages, sheds, PHAC expert advises

The laboratory is part of the Public Health Agency of Canada.

With an incubation period of one to eight weeks, monitoring the Canadians coming home for signs of Andes virus and acting on it quickly is “critical,” Safronetz said.

“I think as long as people do that, we remain at a low risk, both in Canada and really globally,” he said.

Human-to-human spread of Andes virus requires very close and prolonged contact, and usually occurs in partners, household contacts or medical staff who have spent a lot of time with the patient, according to the World Health Organization.

“I don’t think this outbreak is going to go much beyond contacts that were associated with that direct cruise ship itself,” Safronetz said.

But that doesn’t mean that Canadians shouldn’t pay attention to hantaviruses, because they can still be exposed to another type called Sin Nombre virus, which is carried by deer mice.

Sin Nombre virus causes the same illness, called hantavirus pulmonary syndrome (HPS), that Andes virus does.

“The situation on the cruise ship is extremely unfortunate, but it does serve as a good reminder that this is the season where we start to see cases of HPS in Canada,” Safronetz said.

That’s partly because spring is the time when people open their cottages or venture into sheds where mice are likely to be.

“It’s important to remember (that) just because you don’t notice rodents, it doesn’t mean they haven’t been there,” he said.

“If you are opening up outlying buildings, whether it’s a shed or a cottage (or a) cabin … let it air out as much as you can. Open windows, open doors.”

If you see feces, spray them with a mild detergent or bleach solution and let them sit for awhile before sweeping or vacuuming them up.

“That will help inactivate the virus,” Safronetz said.

Wear a mask — preferably an N-95 mask — so you don’t inhale aerosolized particles of the feces, he said.

“That goes a long way to preventing HPS disease in humans.”

Hantavirus pulmonary syndrome is rare in Canada, he said, with about five to eight cases a year.

But there is also no antiviral medication for it and the mortality rate is about 30 per cent.

The majority of cases that have been detected in Canada have been in Alberta, Saskatchewan, Manitoba and B.C., Safronetz said.

Symptoms of hantavirus pulmonary syndrome often begin with tiredness, a fever or gastrointestinal symptoms, then progresses to respiratory distress.

Treatment for HPS is mainly supportive care, including pain management, maintaining fluids and helping patients to breathe — including using a ventilator if needed, according to the World Health Organization.

This report by The Canadian Press was first published May 7, 2026.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

Nicole Ireland, The Canadian Press

by The Canadian Press

Worried about hantavirus? Take precautions when opening cottages, sheds, PHAC expert advises

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