A. <span>Exposure to an antigen
Exposure to viruses and antigens led to the foundation of modern vaccination. Vaccination introduces an antigenic material that helps the ability of the immune system to adapt a specific pathogen, therefore leading to a long-term immunity.</span>
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your joints, stretch the joint capsule. Gas is rapidly released, which forms bubbles.
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radioactive dating? what the hell is that?
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Answer: The resulting proteins made by the human gene are similar to the proteins made by the mouse gene.
Just took the test.
