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138 bytes added ,  13:17, 6 September 2008
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**Organisms can be killed using radiation or chemicals so that they still possess the antigens to stimulate an immune response, but the organisms are unable to replicate inside the host
 
**Organisms can be killed using radiation or chemicals so that they still possess the antigens to stimulate an immune response, but the organisms are unable to replicate inside the host
 
**Toxins are inactivated to produce a toxoid which will still have the antigens needed to produce an immune response but will not be harmful to the host
 
**Toxins are inactivated to produce a toxoid which will still have the antigens needed to produce an immune response but will not be harmful to the host
**Needs two doses
+
**Needs two doses (for an explanation on the T cell responses click [[B cell differentiation - WikiBlood#T-Cell Dependent and Independent Responses|here]])
    
===Subunit Vaccine (part of the organism)===
 
===Subunit Vaccine (part of the organism)===
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