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→Which type of vaccine is used for each disease?
===Immunity to Virus Infection===
===Immunity to Virus Infection===
[[Image:Virus Life Cycle.jpg|thumb|right|150px|Virus Life Cycle - Copyright Dr Brian Catchpole BVetMed PhD MRCVS]]
*The virus life cycle consists of an extracellular phase, a replicative intracellular phase and another extracellular phase spreading viral particles to other cells to begin the life cycle again
*The virus life cycle consists of an extracellular phase, a replicative intracellular phase and another extracellular phase spreading viral particles to other cells to begin the life cycle again