Despite the countless wars and massacres inflicted by humans upon themselves across the centuries, the biggest threat to humanity is disease. Eliciting a morbid fascination in many, deadly diseases are responsible for millions of deaths throughout the history of the human race, making them the most cutthroat killer of them all.
Even now, Ebola is posing a serious threat to the world's population as an outbreak continues to spread from West Africa. From peasants to royal families, everyone is at risk of becoming a victim. Here at Billionaires Australia we've created a list of the 25 deadliest diseases in history. Not to freak you out or anything, but it's worth noting that some of these illnesses have no known cure, just keep that thought in mind as you click through our gallery.
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