A vaccine is an antigenic preparation used to produce active immunity to a disease, in order to prevent or ameliorate the effects of infection by any natural or "wild" strain of the organism. The term derives from Edward Jenner's use of cowpox ("vacca" means cow in Latin), which, when administered to humans, provided them protection against smallpox, which Pasteur and others perpetuated. The process of distributing and administrating vaccines is referred to as vaccination.

Vaccines against cancer are also being investigated; see cancer vaccine. In this case, the antigenic preparation is derived from the cancer cell. There is also research on an HIV vaccine.

Origin of vaccines

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Hepatitis A Vaccine - Twitter Search

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iMedixQnA (iMedix Q&A) Sat, 07 Nov 2009 17:25:31 -0000
can hepatitis b vaccine produce a false positive result http://bit.ly/4zUhwX
I got my Hepatitis A vaccine today. I feel pretty fucking invincible.
billycheer (No Real Max Steele) Fri, 06 Nov 2009 18:36:18 -0000
I got my Hepatitis A vaccine today. I feel pretty fucking invincible.
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radkamrin (Austina Thornley) Wed, 04 Nov 2009 10:34:34 -0000
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radkamrin (Austina Thornley) Wed, 04 Nov 2009 05:33:55 -0000
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TIMJNZ (TIMOTHY E JONES) Wed, 04 Nov 2009 01:40:55 -0000
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parentalone (Single Parent) Tue, 03 Nov 2009 23:53:18 -0000
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