ChloeB, on 02 November 2009 - 12:11 AM, said:
How is the process different? Vaccines are a modified live version or a killed inactivated virus to stimulate the body's response to build up the immunity without developing all the symptoms, seems the same to me.
The smallpox vaccine was different because they weren't infecting you with the very illness you're hoping to avoid getting. They infected you with a one that they knew was harmless except for a little scarring that had the benefit of immunizing you from a much more lethal virus.
The flu vaccines are just weakened versions of the illness you don't want packed full of preservatives for an increased shelf life and mass production. The processes are similar, but not the same.