> Is this a real risk or "we've always done it this way"? I assume the risk assessment assumes some percentage of sick pigs are contained within each. In the U

> Is this a real risk or "we've always done it this way"? I assume the risk assessment assumes some percentage of sick pigs are contained within each. In the US, this percentage is tracked. From another country, the upper, and probably very realistic, bound is 100%. Think small, unvaccinated farm, or one that slaughters sick pigs because they need the money. It would be interesting to see their math. Swine fever just recently has a vaccine. I doubt many US pigs are vaccinated: https://www.science.org/content/article/news-glance-african-swine-fever-vaccine-low-dose-radiation-and-bees-fish https://www.science.org/content/article/news-glance-african-...