By now, we have all heard about the severe and fatal nature of Ebola but the pandemic isn't the most catastrophic in history. Over the last couple of centuries deadly pandemics have killed hundreds of millions of people.
During World War II a disease that affected half the global population was heavily censored in the United States. One viral disease was passed on by simply facing an infected person. And out of all these pandemics, only one disease has been completely cured and eradicated.
From the 14th century bubonic plague to the more recent emergence of AIDS in the 1980's, Laci breaks down the top 5 deadliest pandemics in human history.
Related Gallery: Ebola in 2014