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WHAT ARE VACCINES? DESCRIBE IT BRIEFLY...!...
WHAT ARE VACCINES? DESCRIBE IT BRIEFLY...!
Vaccines are products that protect people against many diseases that can be very dangerous and even deadly. Unlike most medicines that treat or cure diseases, vaccines prevent you from getting sick with the disease in the first place. Vaccines are products that produce immunity to a specific disease. Most vaccines are given by injection (needle), but some are given orally (by mouth) or nasally (sprayed into the nose). You can find more information here.