Picture of working cats detecting dangerous microbes in baggage of visitors to Britain 1935

This is probably a fiction but it is a cute thought: working cats sniffing for dangerous microbes in baggage belonging to travellers entering Britain in 1935. True working cats but impractical. But dogs are made for this work and they do it most impressively today all over the world, detecting a range of illegal imports from money to drugs.

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Poster of working cats detecting dangerous microbes in baggage of visitors to Britain 1935. Image believed to be in the public domain.