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== Combination Vaccine == ...ination Vaccine''' (pronunciation: /kɒmbɪˈneɪʃən ˈvæksiːn/) is a type of [[vaccine]] that combines two or more different vaccines into a single shot. The purp

== mRNA Vaccine == ...a molecule called messenger RNA (mRNA) to produce an immune response. The vaccine is designed to instruct cells in the body to produce a protein that trigger

* [[Adverse reaction]] - an unintended and unwanted side effect of some sort of treatment, usual * [[Allergen]] - a substance that causes an allergic reaction