Immunology Proctored Exam Help for Nursing & Pre-Med Students

Immunology covers the immune system's response to infection, the mechanisms of vaccines, hypersensitivity reactions, autoimmune diseases, and immunodeficiency states. NurseQuizPrep specialists provide immunology exam prep with nursing clinical applications.

Innate vs. Adaptive Immunity

The innate immune system provides non-specific, immediate defense (skin barriers, neutrophils, macrophages, complement, natural killer cells). The adaptive immune system develops specific immunity via B and T lymphocytes and has memory.

• Innate: first line (skin, mucus), second line (inflammation, fever, complement)
• Adaptive: cell-mediated (T cells) and humoral (B cells, antibodies)
• Memory cells: basis for vaccination — faster, stronger response on re-exposure

Hypersensitivity Reactions

The four types of hypersensitivity reactions and their clinical relevance in nursing: Type I (IgE-mediated anaphylaxis), Type II (cytotoxic — hemolytic anemia, transfusion reactions), Type III (immune complex — serum sickness, lupus), Type IV (delayed-cell mediated — PPD test, contact dermatitis).

• Type I anaphylaxis: epinephrine (1:1000) IM to anterolateral thigh — first-line
• Type II: ABO incompatibility transfusion reaction — STOP transfusion immediately
• Type IV PPD: read at 48-72 hours — induration ≥10mm positive in most groups

Vaccines & Herd Immunity

Vaccine types (live attenuated, inactivated, subunit, mRNA, toxoid), vaccine-preventable diseases, immunocompromised patient considerations, and herd immunity thresholds.

• Live attenuated vaccines: contraindicated in immunocompromised patients
• mRNA vaccines: COVID-19 — does not alter DNA, does not integrate into genome
• Herd immunity: ~95% coverage needed for measles (highly contagious)