Gayle Tzemach Lemmon

In Tunisia, where women have long enjoyed greater rights than many of their Arab neighbors, women pushed for and won a new electoral code that guarantees women will make up half of a candidates' list for office.

Now, when you get a viral infection, what normally happens is it takes days or weeks for your body to fight back at full strength, and that might be too late. When you're pre-immunized, what happens is you have forces in your body pre-trained to recognize and defeat specific foes. So that's really how vaccines work.