flu is apolitical and does not discriminate between rich and poor. Geographical boundaries are meaningless, and it can circle the globe within hours.… - Sanjay Gupta

When most people hear "flu," they typically think of . No doubt, seasonal flu can be deadly, especially for the very young and old, as well as those with compromised immune systems. For most people, however, the seasonal flu virus, which mutates just a little bit every year, is not particularly severe because our immune systems have already probably seen a similar flu virus and thus know how to fight it. It's called native immunity or protection, and almost all of us have some degree of it. Babies are more vulnerable because they haven't been exposed to the seasonal flu and older people because their immune systems may not be functioning as well. Pandemic flu is a different animal, and you should understand the difference.

Experts say we are "due" for one. When it happens, they tell us, it will probably have a greater impact on humanity than anything else currently happening in the world. And yet, like with most people, it is probably something you haven't spent much time thinking about. After all, it is human nature to avoid being consumed by hypotheticals until they are staring us squarely in the face. Such is the case with a highly lethal flu pandemic. And when it comes, it will affect every human alive today.

I was a bookish kid. I spent long hours in the library reading everything I could find, histories, biographies, science fiction, fantasy, mysteries. I was curious about the world and there’s no better way to find things out than through the pages of a book. Even today if some kid asks me what’s the first step to take to become a doctor, I answer, “Read, read, read.”