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NationMaster - Encyclopedia: Timeline of vaccines |
 | | Vaccines have contributed to the eradication of smallpox, one of the most contagious and deadly diseases known to man. Other diseases such as rubella, polio, measles, mumps, chickenpox, and typhoid are nowhere near as common as they were just a hundred years ago. |
 | | A vaccine (named after vaccinia, the infectious agent of cowpox, which, when innoculated, provides protection against smallpox) is used to prepare a human or animal's immune system to defend the body against a specific pathogen, usually a bacterium, a virus or a toxin. |
 | | Dissenters falsely suggest that modern vaccines might result in outbreaks of smallpox (in fact, they contain no smallpox virus: they contain live vaccinia virus), and suggest that infections in the past originated (as in the small vaccinia outbreak in England in 1961), spread in greater proportion, and/or were more lethal amongst the vaccinated. |
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