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Answer:
I think Phenytoin (Dilantin) is the answer. since it is useful for the prevention of tonic-clonic seizures and focal seizures,
The pancreas and gland cells of the small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones.
answer is digestive enzymes
They help to prevent the disease from occurring. The immune system becomes familiar with the pathogen and learns how to fight it. Its the same process with vaccines