The Black Death :Bubonic Plague
The black death is one of the deadliest diseases in human history. It ravaged most part of Europe and the Mediterranean from 1346 to 1353. It killed over 50 million people. The plague is mainly spread through the bite of a flea infected with the causing bacterium. it's mainly found on small animals such as rats ,gerbils ,marmots and squirrels. This is the only significant plague recorded in human history. Even today ,plague has not been eradicated , but because there's availability of vaccination and antibiotics ,few people of it . Plague foci still exist in Africa ,North and South America and Asia.
Smallpox is one of the oldest diseases in human history. It's said to first appear around 10,000 BC .The disease is described in ancient Sanskrit texts. The disease is caused by the Variola virus. Humans are the only natural hosts .The disease is transmitted upon direct contact with an infected person or infected body fluids. The spread is more likely in enclosed settings such as buildings ,buses ,and trains. The disease has an incubation period of 17 days ,or an average of two weeks after exposure to the virus . According to the world health organization,smallpox has been successfully eradicated. The global success was a result of mass vaccination campaign that began in 1967 and continued until WHO announced that's the disease has been eradicated
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