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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Typhoid Vaccine - Twitter Search

妻が医療従事者ってことで，swine flu vaccineを受けてきた。自分の方は，自分の免疫力に自身があるので，あんまり受ける気しないけど。fluで発病した記憶がないし，typhoid feverも1週間耐えたしねぇ。
hatsuru (Hatsuru Morita) Sun, 08 Nov 2009 12:50:12 -0000
妻が医療従事者ってことで，swine flu vaccineを受けてきた。自分の方は，自分の免疫力に自身があるので，あんまり受ける気しないけど。fluで発病した記憶がないし，typhoid feverも1週間耐えたしねぇ。
just got Hep A and typhoid vaccine (on my butt), prescribed malarone, ready for the #Philippines and #Palau in January!!
asimulator (aSIMULAtor) Fri, 06 Nov 2009 12:07:02 -0000
just got Hep A and typhoid vaccine (on my butt), prescribed malarone, ready for the #Philippines and #Palau in January!!
Nuts to the H1N1 vaccine. I'll be Typhoid Kaiser for the holiday season. Aaa....AAAAAA-CHOOO!
Kaiser_Machead (Robert Alicea) Thu, 05 Nov 2009 02:07:54 -0000
Nuts to the H1N1 vaccine. I'll be Typhoid Kaiser for the holiday season. Aaa....AAAAAA-CHOOO!
Just had typhoid, Hep A and swine flu vaccine. Now feel like arm is about to fall off.
sandraom (Sandra O'Malley) Wed, 04 Nov 2009 00:24:23 -0000
Just had typhoid, Hep A and swine flu vaccine. Now feel like arm is about to fall off.
Taking my typhoid vaccine....any guesses on what the best word out on this box is? http://twitpic.com/o00oi
mikerusch (Mike Rusch) Mon, 02 Nov 2009 13:33:36 -0000
Taking my typhoid vaccine....any guesses on what the best word out on this box is? http://twitpic.com/o00oi
just completed my Typhoid vaccine for my trip to Thailand, because I'd rather not find out why "Typhoid" and "Thai Food" sound so similar...
juddybuddy36 (Justin Stech) Mon, 02 Nov 2009 02:47:30 -0000
just completed my Typhoid vaccine for my trip to Thailand, because I'd rather not find out why "Typhoid" and "Thai Food" sound so similar...

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