To grow a virus or bacteria
Growing viruses and bacteria requires an un-clean medium for them to propagate. This can be in the form of animal tissue, human blood products, gmo yeast and aborted fetal tissue. Fetal tissue is a preferred choice due to the otherwise potential contamination with animal diseases and cross-transfer of animal DNA to humans.
Avian eggs or cells derived from foul embryos have been, and remain to be, commonly used to grow viruses and bacteria. Other serums, such as polio, were grown in monkey kidney cells obtained by killing them for cell cultures. This not only puts a drain on the monkey population, but also carries the risk of monkey viruses such as SV40, which was found to cause cancer in humans.
High risks are involved with using human fetal tissue, including the transference of diseases and genetic material the fetus was carrying while in the womb. Human parts can cause the production of antibodies to human tissue. Children produce antibodies to every component of each vaccine, not simply the viruses. This can cause demylination of the nerves and auto immune disorders. Children given the MMR who later suffered autism have been found to have antibodies to their own brain tissue. This may be a consequence of using fetal tissue in the MMR.
Present in the blood of autistics are high levels of non-inherited antibodies that conflict with the body’s brain tissue.
Ref: Dr Catarina Amorim; Journal of Neuro-immunology