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1.vaccine is an antigenic substance prepared from the causative agent of a disease or a synthetic substitute, used to provide immunity against one or several diseases.
 viral vaccines include measles, mumps,rubella, varicella, yellow fever, influenza (intranasal) and Oral polio vaccine.


1.the clear, pale-yellow liquid that separates fromthe clot in the coagulation of blood; blood serum.2.immune serum.3.any watery animal fluid.4.the thin, clear part of the fluid of plants.5.milk whey.
2 3 2
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