Question

What is meant by 'memory' in the context of acquired immunity?

Options

• The capacity to remember all types of antigens indefinitely

• The ability to recognize only the first pathogen encountered

• After the first exposure, the immune system forms memory cells that enable a faster and stronger response upon subsequent exposures to the same pathogen

• The retention of antibodies in the bloodstream permanently

Answer 1

Memory in acquired immunity refers to the formation of memory cells after the first exposure to a pathogen. These memory cells enable the immune system to recognise and respond more rapidly and intensively upon re-exposure to the same antigen, which is the basis of vaccination effectiveness.