Take this quiz and see how well you know about death rate in worst pandemics??
![Take this quiz and see how well you know about death rate in worst pandemics?](https://ezeedigi.com/images/app1907/landingpage.jpg)
And outbreaks of these diseases across international borders, are properly defined as a pandemic, especially smallpox, which throughout history, has killed between 300-500 million people in its 12,000-year existence.
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