I came here to work custom writing hub “There are several different kind of vaccines, most common being what is called the inactive flu vaccine, which is the typical flu shot. These vaccines contain inactive viruses, which means that the influenza virus that is administered is dead,” said the Alaska state epidemiologist, Joe McLaughlin. “None of the flu vaccines actually cause the influenza, which is a question that gets asked quite often. The virus is killed and only the antigen is present. Then there is a flu vaccine that is coming in the form of a nasal spray that contains an attenuated virus, which is a weakened specimen of the influenza virus. These viruses can replicate in the nose, but they cannot survive past the nose, meaning that they can’t replicate in the human respiratory system, as the body is too warm for it to survive.”