Quarantine regulations are established to prevent the introduction of foreign diseases into a country. This is done by restricting the importation of diseased plant and animal materials that may carry harmful pests and diseases. By enforcing quarantine regulations, countries can protect their agricultural industries and ecosystems from the rapid spread of foreign diseases, which could have devastating consequences for local farmers and the environment. In short, quarantine regulations are a proactive measure taken by governments to safeguard their national interests and the health of their citizens.