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→Whole Organsim
*Killed inactivated organism or toxin (toxoid)
*Killed inactivated organism or toxin (toxoid)
**Virulent and toxic organisms cannot be used as vaccines as they would cause disease
**Virulent and toxic organisms cannot be used as vaccines as they would cause disease
**Organisms can be killed using radiation or chemicals so that they still posess 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 reponse 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 reponse but will not be harmful to the host
**Needs two doses
**Needs two doses