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Unclear if hantavirus tests always useful: experts

Health experts say it’s not clear whether it’s useful to test people who may have been exposed to hantavirus but don’t have symptoms. Dr. Bonnie Henry, British Columbia’s provincial health officer, says public health officials around the world are discussing the issue as passengers from a hantavirus-stricken cruise ship have returned to their home countries.  She says tests for some viruses aren’t effective before patients develop symptoms and little is known about how well testing works in rare cases of hantavirus. Henry says if any of the 10 people in Canada who may have been exposed to the virus develop symptoms, health…

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