Some 19 countries have been affected by Donald Trump's new travel ban —Newsweek has broken down all the exceptions travellers need to know about.The ContextThe president announced on Wednesday that travel would be fully restricted from 12 nations: Afghanistan, Burma, Chad, Republic of the Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen.Meanwhile, travel for people from Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela will be partially restricted.The new rules, which Trump said are to "protect the nation from foreign terrorist and other national security and public safety threats," come into effect as of June 9.He cited a recent attack in Boulder, Colorado that targeted a group advocating for the release of Israeli hostages being held by Hamas in the Gaza Strip.Mohamed Sabry Soliman, a 45-year-old Egyptian national, is facing attempted murder and federal hate crime charges related to the attack.Exceptions To Donald Trump's Travel BanExceptions to these new restrictions apply to the following groups of people: Any permanent resident of the United States and anyone with dual citizenship Foreign nationals with diplomatic visas (A-1, A-2), such as ambassadors, ministers or military personnel People with transit visas (C-2, C-3) People who work for international organizations such as the United Nations or the World Bank (G-1, G-4) People with NATO visas (NATO-1, NATO-6) Athletes and their teams, including supportive members and immediate relatives, traveling for the World Cup, Olympics or other major sporting event as determined by the Secretary of State Holders of immediate family immigrant visas (IR-1/CR-1, IR-2/CR-2, IR-5) "with clear and convincing evidence of identity and family relationship" Children who have been adopted abroad (visas IR-3, IR-4, IH-3, IH-4) People with Afghan Special Immigrant Visas, given to Afghans who helped the U.S. government during the war there Iranians fleeing persecution because they are part of a religious minority, such as Christians United States Government employees U.S. Attorney General Pam Bondi and U.S. Secretary of State Marco Rubio also both have the discretion to put individuals forward for exception based on whether they would "advance a critical United States national interest," the White House proclamation says.For example, Bondi could make an exception for someone required to be present in criminal proceedings as a witness.What Happens NextSeveral of the countries affected by the ban have responded. Somalia has pledged to work with Washington, while Venezuela has hit back with Interior Minister Diosdado Cabello saying "being in the United States is a great risk for anyone."Trump said that "the list is subject to revision based on whether material improvements are made and likewise, new countries can be added as threats emerge around the world."