Successful Vaccination
For vaccination to be successful it must be ❌ to immunise the most ❌ population, have very few ❌, have a means of ❌ and ❌, have a means of ❌ the vaccine and must be able to produce a ❌ effect.
However, vaccines don't eliminate disease as they may fail to ❌ is certain individuals, may develop the disease immediately after a vaccination, the pathogen may mutate frequently (❌) or certain pathogens may hide from the immune system.
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economically available
economically available
side effects
side effects
transporting
transporting
administrating
administrating
herd immunity
herd immunity
induce immunity
induce immunity
antigenic variability
antigenic variability