SARS originated in a wet market, from civet cats. Filth and nastiness. Looks like the animal to human jump might have been from a similar market in this ilness. From your link:
Early on, many of the patients in the outbreak in Wuhan, China reportedly had some link to a large seafood and animal market, suggesting animal-to-person spread. However, a growing number of patients reportedly have not had exposure to animal markets, suggesting limited person-to-person spread is occurring, though it’s unclear how easily or sustainably this virus is spreading between people.