Vaccines introduce weakened pathogens to stimulate immune responses and create long-term immunity. Immunization provokes immune responses without causing sickness, resulting in protection against various diseases. Memory cells store antigen information, enabling quick and robust immune responses upon re-exposure to pathogens.
Vaccines work by introducing weakened forms of pathogens or their products to stimulate the production of protective antibodies or T cells without causing the disease. For example, the Pfizer-BioNTech and Moderna COVID-19 vaccines consist of a piece of the virus's genetic material (mRNA).
Through immunization, the body is deliberately exposed to a pathogen to provoke an immune response and memory cell formation. This process establishes long-term immunity against diseases like measles, mumps, and chicken pox.
Memory cells play a crucial role in vaccination by storing information about specific antigens, allowing the immune system to mount a faster and stronger response upon re-exposure to the pathogen.
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