Late one night, 44-year-old Irene Mabande’s four-year-old daughter Emerald suffered a severe asthma attack at home in Tubmanburg, the capital of Bomi County in the northwest of Liberia. “She was striving for air. She couldn’t breathe on her own,” Mabande recalls. “In the hospital, they don’t have a nebulizer for asthmatic patients, so the only thing that could bring her back was oxygen.”