Theoretically, all that's needed is to grind virus-protein-containing tobacco or quinoa leaves into powder, then mix it with pig feed. However, the effectiveness of this oral vaccine has yet to undergo evaluation. Issues include, for instance, how to control the quantity of food eaten and the ability of the antigens to remain in the digestive tract.
理論上，只要將含有病毒蛋白的菸草或藜草葉片磨成粉，就能混在飼料中餵豬，然而，口服疫苗成效如何尚需經過評估，例如，如何控制進食的量，以及抗原經過消化道的保存能力等等。