In the United States, we can practically start planning our kids' birthdays from the day they come home from the hospital; deaths in childhood are quite rare. In Ghana, though, you can't take a child's fifth birthday for granted.
Likewise, as one of only three remaining countries in the world with endemic polio transmission, they have recently ramped up efforts to eradicate polio from the country, and thereby, help rid it from the entire world.
A deadly new influenza virus has managed to jump from pigs to people in a previously unseen mutated form that can readily spread among humans. How could this happen? There are several plausible explanations.