#6 – Smallpox
All of us have probably heard of this bizarre illness. Smallpox appeared as early as 10,000BC and before it had been eradicated, it took millions of lives. Luckily, this disease has been eradicated and is now only kept in laboratories with the highest security.
This disease was characterized by high fever, fatigue, and a rash with flat red sores that would spread over the whole body.