Guinea trial shows "historic" success for Ebola vaccine
More than 11,300 people died in West Africa's 2013-2016 epidemic of the virus, which causes hemorrhagic fever
Many Brazilian women avoiding pregnancy due to Zika fears - study
Zika, a viral disease carried by mosquitoes, has spread to more than 60 countries and territories since the current outbreak was identified last year in Brazil
Nigeria in talks to secure release of more Chibok girls, official says
Around 270 girls were taken in April 2014 from their school in Chibok, Borno state, where Boko Haram has waged a seven-year insurgency
Syrian army announces victory in Aleppo in boost for Assad
At least 34,000 people, both civilians and fighters, had been evacuated from east Aleppo in a week-long operation
Bathroom law battles loom in more states after North Carolina controversy
In Texas, Republican Lieutenant Governor Dan Patrick has said a bathroom bill will be a priority
U.N. warns of water crisis in Nigeria's megacity Lagos
Estimates suggest only one in 10 people have access to water supplied by the state utility provider
U.S. parents accept children's transgender identity by age 3
Fifteen percent of transgender Americans say they ran away from home or were kicked out of the house
U.N. warns of water crisis in Nigeria's megacity
Estimates suggest only one in 10 people have access to water supplied by the state utility provider
Now in Turkey, young Syrian Twitter star dreams of return to Aleppo
"My school and my garden were bombed. I miss my house"
Christmas cheer returns to Nigeria's Boko Haram heartland
Boko Haram has carried out several deadly attacks on churches in the past