Definition: Vaccinas are a type of vaccine that is used to prevent or treat diseases. They consist of a weakened form of an organism, called the "vaccine," which is then injected into the body in small amounts. This helps to activate the immune system and help it fight off the disease, making it easier for the body to fight any future infections. Vaccines can be given orally, intravenously (through a vein), or subcutaneously (under the skin). They are often recommended
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