For this report, you will select a vaccine- preventable disease or  biological agent and describe the characteristics of a homeostatic system in both health and in a diseased  state. Your report  should include the pathophysiological  impact on the body system affected  in disease,  how the disease functions in homeostasis, as  well as a physiological explanation as to how the vaccine  works . 

 For this report, you will select a vaccine- preventable disease or  biological agent and describe the characteristics of a homeostatic system in both health and in a diseased  state. Your report  should include the pathophysiological  impact on the body system affected  in disease,  how the disease functions in homeostasis, as  well as a physiological explanation as to how the vaccine  works .