RT @BillGates: Interesting. This student’s invention could help save millions of lives: https://t.co/4poUGx2SWc https://t.co/s4rml3j0XC

RT @BillGates: Interesting. This student’s invention could help save millions of lives: https://t.co/4poUGx2SWc https://t.co/s4rml3j0XC