Cattle colonies and 'wet markets' for live animals are not unique to Wuhan, the Chinese city where the SARS-CoV-2 virus most likely originated. They exist all around the world. And given their largely unregulated nature, the emergence of the next major infectious pathogen is only a matter of time. For example, you might not expect to find the world's largest buffalo colony in Karachi, Pakistan, a metropolis with 14 million ...