How was African swine fever introduced into my country?

African swine fever virus first appeared in sub-Saharan Africa. Local wild boars and warthogs often carry this virus, and soft ticks that feed on the blood of wild boars have become the transmission medium for the virus, thus further expanding.

Classical swine fever first broke out in the United States in 1810. It is a viral disease of pigs that appeared in the New World. It was introduced to Europe in the 1820s, broke out in France and Germany one after another, and spread all the way to the eastern end of the Eurasian continent. Humans have developed a serum against this type of swine fever, but classical swine fever has not been completely eradicated, and sick pigs still appear from time to time.

It is worth mentioning that African swine fever virus (ASFV) was indeed born in Africa. Compared with diseases/symptoms such as Spanish flu and Hong Kong athlete’s foot that have nothing to do with the named place, it is True to its name. Like almost all viral pathogens, African swine fever virus enters the body of sick pigs.

By extracting useful substances from the cells of sick pigs, we can establish our own "virus factory" to produce more pathogenic bodies, which will flow out of the body through body fluids, feces, etc., and continue to infect other healthy pigs in a short period of time. It can even spread through the air over long distances. African swine fever virus is a DNA virus with a relatively stable structure compared to RNA viruses, and should have been a suitable pathogenic type for vaccine development.