Examlex
Describe the three types of unemployment.
Memory Cells
Specific types of immune cells that remember past infections and can quickly respond to repeated exposures to the same pathogen.
Antigen
A substance that can induce an immune response, often seen as foreign by the body's immune system.
Species Resistance
The natural ability of a species to resist or fend off infections and diseases due to inherent genetic or physiological factors.
Naturally Acquired
Immunity or resistance developed through natural exposure to pathogens rather than through vaccination.
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