Vox sat down with Gates to discuss what he foresees to be the biggest challenges for the world and his own charity foundation that fights malaria, polio and other causes of child mortality, and the answer might surprise you.

Answering the question of 'What's likeliest to kill more than 10 million human beings in the next 20 years?' isn't the easiest or most light topic, but Vox and Gates go into the details surrounding what the next big outbreak could be, and whether or not we're equipped to deal with it.

Slightly doomsday-ish, but fascinating nonetheless.

Via Vox/YouTube