Several epidemics throughout history have many similarities in characteristics. For example, many diseases evolved from poor hygiene between animals and humans and a rise in urban population and interregional communication. Many had very similar effects and modes of transmission.
Because of the similarities, many historians are looking into allegations of these diseases stealing each other's methods, committing plague-iarism.
It's foolish for humans to try and take back the planet of the apes Since they are incredibly good at gorilla warfare.