The Trump administration announced immigration bans on six countries, including Nigeria, Africa’s most populous nation.

Citizens from Nigeria, Eritrea, Myanmar, and Kyrgyzstan are disallowed from applying for immigration visas into the United States under the new policy. Sudan and Tanzania, two African countries, will be prohibited from the U.S. diversity lottery program, which selects 50,000 random immigrants from underrepresented countries and grants them green cards. Many recipients of the program are from African countries.