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3 answers

to add to the previous question an 'antibody' is a chain of amino acids. they can be up to 550 'links' long. when a new virus is introduced into a body the immune system fights by modifying existing chains to find one that binds to the virus. this binding is like laying a stretch of 100 jig saw puzzle pieces (the antibody) aganist a matching 100 long stretch (the virus).
Once a working antibody is found, that antibody is cloned for the rest of your life. there are always some floating around the bloodstream. that is why you get life long immunity.
Also if the antibody for one virus happens to work on another virus, you get free immunity. the process of vacinating against small pox was derived from milkmaids (girls who milked cows) who got a disease called cow pox. getting cow pox gave you an antibody that worked on small pox too.

2007-06-02 09:53:36 · answer #1 · answered by Piglet O 6 · 0 0

Your body developes anti-bodies to fight the disease. These remain in your system to combat a reoccurence.

2007-06-02 08:32:51 · answer #2 · answered by Anonymous · 1 1

Your body has built up antibodies to fight the disease.

2007-06-02 10:40:14 · answer #3 · answered by robee 7 · 0 1

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