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HomeHomework HelpbiologyVaccination and Immunity

Vaccination and Immunity

Vaccination is the process of introducing a harmless form or component of a pathogen into the body to stimulate an immune response, thereby preparing the immune system to recognize and combat the actual pathogen in the future. Immunity refers to the state of being resistant to a specific infectious disease, often achieved through vaccination or prior exposure to the pathogen, enabling the body to respond more effectively upon subsequent encounters.

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Vaccination is a vital public health tool that helps prevent the spread of infectious diseases. By introducing a harmless part of a pathogen into the body, vaccines stimulate the immune system to produce antibodies and memory cells, which prepare the body to fight off future infections. This process...

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Key Terms

Antibodies
Proteins produced by the immune system to neutralize pathogens.

Example: After vaccination, the body produces antibodies against the virus.

Pathogen
An organism that causes disease, such as bacteria or viruses.

Example: The flu virus is a common pathogen.

Immunity
The ability of the body to resist a particular infection.

Example: Vaccination helps develop immunity to diseases.

Live Attenuated Vaccine
A vaccine that contains a weakened form of the pathogen.

Example: The MMR vaccine is a live attenuated vaccine.

Inactivated Vaccine
A vaccine made from killed pathogens.

Example: The polio vaccine is an inactivated vaccine.

mRNA Vaccine
A new type of vaccine that uses messenger RNA to instruct cells to produce a protein that triggers an immune response.

Example: The Pfizer-BioNTech COVID-19 vaccine is an mRNA vaccine.

Related Topics

Immunology
The study of the immune system and its functions.
intermediate
Epidemiology
The study of how diseases spread and can be controlled in populations.
intermediate
Public Health
The science of protecting and improving the health of communities through education and policy.
advanced

Key Concepts

Immune SystemVaccinesHerd ImmunityAntibodies