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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. (en) |
