From the left, Chairman Senate Committee on Tertiary Education, Senator Binta Masi- Garuba; Wife of the Senate President, Mrs. Toyin Saraki; Wife of the President, Hajiya Aisha Buhari; Co-Founder Bill/Melinda Gates Foundation, Mrs. Melinda Gates; Minister for Health, Prof. Isaac Adewole and the Chairman Senate Committee on Health, Senator Lanre Tejuoso after a meeting when Mrs. Gates paid a learning visit to Nigeria at the Presidential Villa, Abuja. Photo by Abayomi ADESHIDA

From the left, Wife of the President, Hajiya Aisha Buhari; Co-Founder Bill/Melinda Gates Foundation, Mrs. Melinda Gates; Wife of the Imo State Governor, Mrs. Nkechi Okorocha and the Wife of Ogun State Governor, Mrs. Olufunsho Amosun after a meeting when Mrs. Gates paid a learning visit to Nigeria at the Presidential Villa, Abuja. Photo by Abayomi ADESHIDA

From the left, Wife of the President, Hajiya Aisha Buhari; Co-Founder Bill/Melinda Gates Foundation, Mrs. Melinda Gates; Wife of the Imo State Governor, Mrs. Nkechi Okorocha and the Wife of Ogun State Governor, Mrs. Olufunsho Amosun after a meeting when Mrs. Gates paid a learning visit to Nigeria at the Presidential Villa, Abuja. Photo by Abayomi ADESHIDA

Co-Founder Bill/Melinda Gates Foundation, Mrs. Melinda Gates flanked by Wife of the President, Hajiya Aisha Buhari and the Wife of the Imo State Governor, Mrs. Nkechi Okorocha (4r); the Wife of Ogun State Governor, Mrs. Olufunsho Amosun (3r) and others in a group photograph with Wives of Governors after a meeting when Mrs. Gates paid a learning visit to Nigeria at the Presidential Villa, Abuja. Photo by Abayomi ADESHIDA