The “Dirty Little Secret”* About Vaccines

Note: This originally appeared on the SciBox section of the Oxford SciBar. Check out the site, there’s a host of podcasts of talks and other articles there.   In some ways, the immune system’s like a brain: it can learn, it can adapt and, so it’s ready for the next time, it can remember. This is, perhaps, its single most important feature. The immune system has the chance to learn a unique signature on the surface of an invader every time we’re infected by something, be it virus, bacteria or even a parasite. Once it learns these signatures the body produces antibodies or ’killer cells’ to fight it. When the infection has been defeated, special cells – B-cells – remember it, for as long as a life time. If the invader returns it won’t have such an easy time: the immune system will be ready. Like most things that learn, the ...(Read More)