Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Vaccinia
Medically reviewed by Min Clinic Staff | Updated: January 2026
Vaccinia: 1. The cowpox virus which is used to vaccinate against smallpox. 2. A cutaneous or systemic reaction to vaccination with the smallpox vaccine as, for example, in congenital vaccinia and progressive vaccinia.