Post-Smallpox Vaccination Skin Eruption in a Marine

Area of Science:

• Dermatology
• Infectious Diseases
• Vaccinology

Background:

• Adverse cutaneous reactions to smallpox vaccination are well-documented.
• These reactions can range from mild to life-threatening, particularly in immunocompromised individuals.
• Differentiating between various vaccine-associated rashes is clinically challenging due to overlapping characteristics.

Observation:

• A case report details a vesiculopustular reaction in a young Marine 9 days post-smallpox vaccination.
• The reaction presented with characteristics that required careful diagnostic consideration.

Findings:

• Review of literature and guidelines reveals several known adverse cutaneous reactions to smallpox vaccines.
• These reactions range from mild and self-limited (e.g., autoinoculation, generalized vaccinia) to severe and potentially life-threatening (e.g., eczema vaccinatum, progressive vaccinia).

Implications:

• Accurate diagnosis of smallpox vaccine-related skin eruptions is challenging due to overlapping clinical features and low incidence of some reactions.
• This case report aims to increase clinician familiarity with these dermatologic manifestations to improve diagnostic accuracy and patient care.