This Is How Your Body Builds Immunity

We encounter bacteria, viruses and parasites all the time, but how exactly does our immune system kill these dangerous pathogens Subscribe to Seeker Watch more Human Visit our shop at Vaccines are quite possibly the greatest thing that humans ever created. Vaccination has its roots in variolation, a technique developed by Asian physicians prior to the 1700s. The physicians would take dust from someones smallpox scab and blow it into their patients nosethe patient would experience a weaker version of smallpox, but then theyd be immune to it for life. Pretty cool, huh And while variolation was far from perfect, when the alternative was contracting a potentially fatal version of smallpox, it was a good first step. And in the hundreds of years since, doctors have made huge advances in vaccination technology like Edward Jenners famous smallpox vaccine made from cowpox virus, or br, br,