Vaccination complications

The abnormal reaction on the skin and mucous membranes after being vaccinated with the attenuated poxvirus vaccine is called a vaccination complication. Vaccination is a method to gain immunity to smallpox by inoculating vaccinia vaccine. Vaccinia virus, or vaccinia virus, is an artificially mutated attenuated strain obtained through long-term and complex passaging and breeding. After vaccination, it only causes local acne without causing smallpox. Vaccination is a fundamental measure to prevent smallpox. Countries around the world have implemented a common vaccinia breeding system, and infants are given primary breeding at the age of 6 to 8 months. Replanted every 5 to 6 years. In addition, re-planting should also be arranged for staff at exit and entry airports, seaports, border crossings, cross-border transportation personnel, overseas personnel, infectious disease and epidemic prevention staff, and re-planting every 2 to 3 years. The global vaccination system of vaccinia enabled human society to finally declare the elimination of smallpox in 1980. Since then, countries have gradually stopped implementing vaccinia vaccination in accordance with WHO recommendations.