For now, the uncertainty about Zika in the US blood supply is similar to that in previous outbreaks of blood - borne infections, such as HIV and West Nile virus. (sciencedaily.com)
Several previous outbreaks of Ebola in central Africa stemmed from dead gorillas or chimps found in the forest and butchered for food. (scientificamerican.com)
The largest outbreak of the MERS coronavirus outside the Middle East is no different from previous outbreaks in the way that it spreads (scientificamerican.com)