NUR-631-D2Q1 Minimum of 300 words with at least 2 peer review reference in 6th edition APA format. Immunity is necessary to prevent infectious diseases from spreading. Differentiate between passive-acquired and active-acquired immunity. Immunoglobulins are necessary to protect the human physiology from diseases and pathological disorders. Explain the role of IgA, IgG, IgE. IgD, and IgM. Purchase this Tutorial.