Almost any dog can be trained to do this type of detection in a matter of weeks, researchers say
.) Canines in that study detected evidence of the virus in samples from 23 out of 45 Long COVID patients in the trial, but not among any of the sweat samples that came from 188 people without Long COVID. That accuracy rate may be an underestimate, says co-author Emilie Seyrat , because some samples had to be sent through the mail during the summer and thus may have been compromised by heat and time.
The fact that dogs can smell virus-related compounds more than a year after people initially got sick supports that idea, says Dominique Salmon-Ceron, an infectious disease specialist at Hôtel-Dieu Hospital in Paris and another author on the Long COVID study. “Our results add to the argument that the virus can probably persist” in the body, she says.
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