APHIS points out that commercial pork production in Sonora is relatively new and that the United States has imposed restrictions on the importation of swine and fresh pork products from Mexico for over 20 years.
Sonora may be more likely to contaminate their pork.
mnli hypothesis: Sonora may be more likely to contaminate their pork. premise: APHIS points out that commercial pork production in Sonora is relatively new and that the United States has imposed restrictions on the importation of swine and fresh pork products from Mexico for over 20 years.