where specific T cells and B cells which recognise the fragments of antigen generate a specific immune response. Other components in the vaccine such as the adjuvant and preservative, if present, are absorbed into the blood where they circulate and are excreted in the stools and urine. *Live viral vaccines multiply several times in the relevant tissues as per natural infection, however these viruses are attenuated so they cannot multiply as much as a the normal infectious virus. Different vaccines stimulate the immune system in different ways.  Some provide a broader response than others.  Vaccines influence the context of the immune response by the nature of the antigens, the amount of antigens, route of administration as well as adjuvants present. Vaccine Components a full description of vaccine components can be downloaded here. [Insert the content from our latest fact sheet]