Chickenpox is a deadly disease caused by a virus which is very serious. It can spread very easily. However, in today's time, smallpox has been completely eradicated. This is a disease caused by the Variola virus, which has caused the death of many people in earlier times. This virus is still kept very safely at two places by scientists for research and people working around it are regularly vaccinated for smallpox.
When smallpox occurs, there are rashes and boils along with fever, which spread all over the body. There are two common types of smallpox - Variola Minor and Variola Major, of which Variola Major is more deadly.
There is no cure for smallpox, but its search is still going on. A smallpox vaccine is available, which can prevent smallpox. This vaccine was given to many people during the global vaccination campaign, as a result of which smallpox was eradicated from the whole world by 1980. Now this vaccine is not regularly given to people, but people who are at risk of getting smallpox should get this vaccine. Keep in mind that this vaccine also has many side effects.This article explains what happens in smallpox, how smallpox spreads and what to do about it.
(Read more - Dos and Don'ts When You Have Chicken Pox)