Viruses can't find a new host species that easily


Denmark is in the process of culling all of its farmed mink – some 17 million animals – after a mutated version of the SARS-CoV-2 virus linked to mink farms was found in humans. — AFP

The emergence of infectious diseases is often the result of a pathogen entering a new host species, as highlighted by the SARS-CoV-2 virus that causes Covid-19.

However, most cross-species transmissions fail to establish a foothold in the new species.

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