| swine fever | 5.20 | Swine fever is highly contagious. | ||
| swine virus | 0.33 | Another study in Nature showed that mice receiving pig tissue transplants did become infected with a swine virus. | ||
| swine outbreak | 0.26 | A swine fever outbreak this year in the Netherlands led to a European Union ban on the export of pigs and pig sperm from the Netherlands. |