Diameter for puncture during smallpox vaccine administration should be within what size?

Diameter for puncture during smallpox vaccine administration should be within what size?

• A. 5 mm
• B. 10 mm
• C. 1 cm
• D. 3 mm

Answer: (A)

During smallpox vaccination using scarification, the goal is to create a small, superficial wound in a confined area so the vaccine reaches the immune cells in the dermis without causing a large lesion. A puncture diameter of about 5 mm provides a localized, sufficient inoculation that reliably produces the characteristic take (the local vesicle/pock) without unnecessary tissue damage. Larger diameters (10 mm or 1 cm) would produce bigger wounds, increase discomfort and scarring, and raise the risk of spread or complications. A smaller diameter (around 3 mm) might not deposit enough vaccine to yield a proper take. Hence, 5 mm is the optimal size.

During smallpox vaccination using scarification, the goal is to create a small, superficial wound in a confined area so the vaccine reaches the immune cells in the dermis without causing a large lesion. A puncture diameter of about 5 mm provides a localized, sufficient inoculation that reliably produces the characteristic take (the local vesicle/pock) without unnecessary tissue damage. Larger diameters (10 mm or 1 cm) would produce bigger wounds, increase discomfort and scarring, and raise the risk of spread or complications. A smaller diameter (around 3 mm) might not deposit enough vaccine to yield a proper take. Hence, 5 mm is the optimal size.