African Swine Fever: Here's why it is a big deal

“The pig mortality will be the least of our worries”, according to US expert Dennis DiPietre. “The business disruption and profit losses from export cessation would range from big to staggering,” he says. DiPietre fears that, within a year or two, “we will be engulfed in a worldwide pandemic”.

 
That probably gives you some idea of the level of concern about African Swine Fever ("ASF").
 
The website of the European Commission gives you some idea of the risks, costs, and extent of ASF to date. 
 
ASF is a highly contagious viral pig disease, some versions can have a 100% mortality rateThere is no treatment for the disease, so there is reliance on biosecurity measures and shooting wild boar to restrict the spread. For example, it was reported that the Czech Republic enlisted the military and snipers to hunt wild boar day and night with night vision equipment, in an effort to limit the spread of ASF. In theory, the 100,000 hectare cull has been deemed successful given that no further incidents of ASF have been detected.
 
Food is a primary means of spread, but the virus can be spread by a number of other means, including contamination of food products, equipment and vehicles.
 
Impacts on the domestic pig industry will raise a host of usual issues associated with animal diseases including, for example, containment and eradication procedures, and enormous detrimental economic impacts particularly for countries where pig production is a primary industry.
 
You can read more by looking at the following websites:
https://www.theguardian.com/environment/2018/oct/24/what-is-african-swine-fever-and-how-does-it-spread
https://europa.eu/european-union/topics/food-safety_en