Top 10 Deadliest Pandemic in History.

In this video you will see top 10 deadlies pandemic in history before Coronavirus (COVID-19).
A pandemic is an epidemic occurring on a scale that crosses international boundaries, usually affecting people on a worldwide scale.[1] A disease or condition is not a pandemic merely because it is widespread or kills many people; it must also be infectious. For instance, cancer is responsible for many deaths but is not considered a pandemic because the disease is neither infectious nor contagious.