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African swine fever (also known as ASF) is a viral disease of pigs and wild boar that is usually deadly. The virus can live in uncooked pork or processed meat for several months and survive in frozen meat for several years. ASF is fatal for pigs,but harmless for humans.Currently,there are neither vaccines __1__ cures.For this reason, it __2__ major impacts on animal health and economy in affected countries.Smuggling of animals across borders and tourism have made __3__ difficult to control the spread of the disease.China has reported 109 cases of ASF in 25 Chinese provinces；__4__ , Taiwan has tightened security efforts by banning pork __5__ from China. Every citizen can help by making sure that they should not bring back pork or pork products from ASF-positive countries.

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