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If a nation is currently operating at a point inside its production possibilities curve,it
Antigenic Drift
A mechanism of variation in viruses that causes small changes in the virus particles over time, leading to new strains that may escape immune recognition.
Surface Antigens
Molecules present on the cell surface that can trigger an immune response, used by the body to identify foreign substances.
Antibodies
Proteins produced by the immune system in response to foreign substances (antigens), which can neutralize or help destroy antigens.
Capsid
Protective protein containing the genetic material of a virus.
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