Edit: That's not a joke: Cheng et al. (2007) Severe Acute Respiratory Syndrome Coronavirus as an Agent of Emerging and Reemerging Infection [0]
> Coronaviruses are well known to undergo genetic recombination, which may lead to new genotypes and outbreaks. The presence of a large reservoir of SARS-CoV-like viruses in horseshoe bats, together with the culture of eating exotic mammals in southern China, is a time bomb. The possibility of the reemergence of SARS and other novel viruses from animals or laboratories and therefore the need for preparedness should not be ignored.