Smallpox vaccine is named, there are 3 main types, liquid cowpox vaccine, chicken embryo tissue pox vaccine, freeze-dried cowpox vaccine. Liquid cowpox vaccine is safe and reliable, and liquid cowpox vaccine is mainly used for vaccination in China. Cowpox virus is attenuated and then made into liquid cowpox vaccine through a special process. The target of vaccination is 1~2 years old children. The area below the arm deltoid muscle is scratched with a cowpox needle through the pox plasma, so that the organism can produce antibodies against smallpox virus and play an immune role, thus preventing from getting smallpox. A person needs to be vaccinated against smallpox 1~2 times in his/her lifetime, and it is better to be vaccinated in the fall. Smallpox is caused by the smallpox virus, which is characterized by strong contagiousness, a wide range, and a high mortality rate, and as long as you have received the smallpox vaccine, you will not be infected for the rest of your life. 1980, the World Health Organization declared that smallpox was extinct from the face of the earth, and that mankind had eradicated smallpox, and therefore the smallpox vaccine had been sealed.