Allergies fit into which category of disease?

A. Active natural: Active natural immunity results from natural infection (you make your own antibodies after being infected), not from vaccination.
B. Active artificial: Vaccination stimulates the host’s immune system to produce its own immune response and memory - this is active artificial immunity.
C. Passive natural: Passive natural immunity is transfer of antibodies naturally (e.g., maternal IgG across the placenta), not induced by vaccine.
D. Passive artificial: Passive artificial immunity is receiving preformed antibodies from an external source (e.g., immunoglobulin injection), not vaccination.

A. Usually the wounds that undergo secondary intention are infected: Many wounds that heal by secondary intention are contaminated or have tissue loss that predisposes to infection (e.g., ulcers, abscess cavities).
B. Secondary intention would take place for a severe burn: Extensive burns with tissue loss typically heal by secondary intention (granulation and contraction).
C. Wound with irregular margins would undergo secondary intention: If edges cannot be approximated (irregular margins), the wound heals by secondary intention.
D. All are true: Each of the above statements accurately describes features of wounds that heal by secondary intention.