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Dogs have been trained to detect a dozen human diseases and most recently, COVID-19. Dogs are famously known for their sense of smell. Their genetics and physiology make them perfectly suited for sniffing. Dogs have so many more genes that code for olfactory ability, and many more olfactory nerve cells than humans.

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Welcome to The Dog Visitor Q&A [2022], where you can ask questions and receive answers from other members of the community.
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