Which of the following statements best describes a key feature of innate immunity?
Pathogen-associated molecular patterns, found on invading pathogens, are recognised by pattern recognition receptors on phagocytic cells, allowing phagocytosis and subsequent pathogen destruction. Memory, specificity and the need for antigen processing are features of adaptive immunity. Primary immune deficiencies affecting innate immunity are well recognised.
It improves with repeated exposure to a given antigen
It requires antigen processing for activation
It is not associated with primary immune deficiency
It includes interaction between pattern recognition receptors on phagocytes and pathogen-associated molecular patterns