In order to keep our body healthy and efficient, we should take certain prescribed vaccinations. The human body is constantly under attack by foreign bodies called Antigens.
Our body reacts spontaneously towards these attacks by producing antibodies. These wage a furious war on the antigens to neutralize them. In case of natural immunization, many times, antigens can prevail over antibodies.
In the last two centuries, a lot of vaccines have been developed for a number of diseases. The vaccinations artificially produce antibodies in our body, by way of injecting antigens in the body.
Vaccinations are done against diseases like diphtheria, typhoid, measles, small pox, etc.
Below Vaccination info from Wikipedia (Read More):-
Vaccination is the administration of antigenic material (the vaccine) to produce immunity to a disease. Vaccines can prevent or ameliorate the effects of infection by a pathogen. Vaccination is generally considered to be the most effective and cost-effective method of preventing infectious diseases. The material administrated can either be live but weakened forms of pathogens (bacteria or viruses), killed or inactivated forms of these pathogens, or purified material such as proteins. Smallpox was the first disease people tried to prevent by purposely inoculating themselves with other types of infections; smallpox inoculation was started in China or India before 200 BC.[1] In 1718, Lady Mary Wortley Montague reported that the Turks had a habit of deliberately inoculating themselves with fluid taken from mild cases of smallpox, and that she had inoculated her own children.[2] Before 1796 when British physician Edward Jenner tested the possibility of using the cowpox vaccine as an immunisation for smallpox in humans for the first time, at least six people had done the same several years earlier: a person whose identity is unknown, England, (about 1771), Mrs. Sevel, Germany (about 1772), Mr. Jensen, Germany (about 1770), Benjamin Jesty, England, in 1774, Mrs. Rendall, England (about 1782) and Peter Plett, Germany, in 1791.
http://en.wikipedia.org/wiki/Vaccinations
