The cells are still alive but they are not the same as before. They have become attenuated or changed in such a way that they can't cause that disease. But they are genetically close enough that they can cause the body to begin to make antibodies and prepare for the real thing to come along.
viruses
Vaccinations are dead cells of the disease. When it enters the body, the body 'fights' the disease without hurting the body. The body then builds up a defense system against this disease and is ready if and when the disease really happens.
Cells can cause disease, but can also prevent disease.
pathogens
Bacteria are prokaryotic cells that cause disease and decay.
Two ways that pathogenic organisms can cause infection and disease is by producing poison and to attack and destroy the living cells they intrude.
infection
A vaccine is really that disease or virus itself. just a smaller amount of it. your blood cells fight that little vaccine to create antidotes. So if u get exposed to that germ your blood cells will use that antidote against it to prevent you from getting sick. Answered by: Emilio Aranda_EL Paso, Tx (Emilioa)
how did the theory of biogenesis lead the way for germ theory disease
The two microscopic organisms that cause disease are bacteria and viruses. Bacteria are single-celled microorganisms that can multiply and cause infections in the body, while viruses are smaller infectious agents that can only replicate inside the cells of living organisms.
They infect your cells in a certain form.
Vaccinations 'show' proteins to B-cells, which then produce antibodies specific to those proteins.