In all honesty? Climate change and reduction of living space for animals and human encroachment will trend towards more of this in the future as diseases bump around more frequently. Hell we haven't even reached the antibiotic resistant bacteria outbreaks yet in this story.
In all honesty? Climate change and reduction of living space for animals and human encroachment will trend towards more of this in the future as diseases bump around more frequently. Hell we haven't even reached the antibiotic resistant bacteria outbreaks yet in this story.