5 the Deadliest Diseases Ever in Human History

5 the Deadliest Diseases Ever in Human History

Human history saw an enormously huge number of diseases including deadly. We are almost resigned to the fact that flu becomes stronger from year to year so that scientists have to develop vaccines and antiviral drugs to bat modified viruses. But deadly diseases which cause epidemics and pandemics are unstoppable by any medicine. Below is the list of 5 the deadliest epidemics known to man since the earliest times.

1. Plague

Plague

Plague is an infectious disease caused by a bacterium named Yersinia pestis. Its infectious agent affects mainly the lungs. Plague is spread in the air, by direct contact and by black rats through bites from fleas. Plague symptoms include a high fever, a cough, a prostration, chills and swollen lymph nodes. The case fatality rate is up to 90% but this decease can be treated in the early stages.

Plague, or The Black Death, is known to be one of the most deadly pandemics which struck Europe in the 14th century causing death of 1/3 of its population. In recent years, outbreaks of plague were detected in such countries as Algeria, China and the Democratic Republic of Congo. In 2010 in Peru there were 17 people found sick with plague.

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