IMMUNIZATION FLUIDS Crossword Clue
IMMUNIZATION FLUIDS Crossword Clue
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Crossword Puzzle Infos
Immunization fluids, also known as sera, are liquids used to protect people from infectious diseases. They contain antigens, which are substances that cause the body to produce antibodies that fight off the disease. Sera can be administered through injection or orally, and are often used to prevent illnesses such as the flu.