Not a contraindication to immunization: Minor illness.

• A. Minor illness
• B. Severe illness with fever
• C. Exposure to an infectious source
• D. Allergies to vaccine components

Answer: (A)

Mild, self-limited illnesses do not prevent vaccination. The immune system can respond to a vaccine even when an individual has a minor illness, so giving the vaccine during a mild illness is generally safe and helps avoid unnecessary delays in protection.

That’s why the correct choice is minor illness. In contrast, a significant ongoing illness with fever is a temporary reason to defer vaccination until symptoms improve, because the body is already fighting a illness and may not mount a full vaccine response. Being exposed to an infectious source does not by itself bar vaccination, since vaccination is a preventive measure. Allergies to vaccine components can be a contraindication, especially if there has been a severe allergic reaction to a previous dose or to a component.