Strong resistance. African swine fever is an acute, hemorrhagic and severe infectious disease caused by African swine fever virus (ASFV), which infects domestic pigs and various wild boars (such as African wild boar and European wild boar). The reason why pigs don't get injections for non-plague is because of their strong resistance. The World Organization for Animal Health (OIE) listed it as a legally reported animal epidemic, and it is also a kind of animal epidemic that China focuses on preventing.