Vaccinations Flashcards
What is passive immunity?
Where antibodies are introduced into the body from another person.
Why aren’t plasma and memory cells made in passive immunity?
A pathogen does not enter the body.
What length of immunity does passive immunity give?
Short-term immunity.
What is active immunity?
Immunity that is created by your immune system following exposure to a pathogen or its antigen.
What is natural active immunity?
Immunity that follows infection.
What is artificial active immunity?
Immunity that follows the introduction of a weakened version of a pathogen or antigen via a vaccine.
What happens during a vaccine?
Small amounts of weakened or dead pathogens or antigens are introduced into the body by mouth or injection.
What do plasma cells make?
Antibodies.
What does immunity do?
Destroys pathogens before symptoms and the disease arise.
What does immunity not do?
Stop the pathogen from affecting the body.
What is herd immunity?
Where lots of the population are vaccinated so the pathogen cannot be spread easily.
Who does herd immunity protect?
People that are too vulnerable to have the vaccination such as children and the ill.
What happens when the vaccine is introduced into the body?
B cells are activated and go through clonal expansion and differentiation to make plasma and memory cells which stay in the blood for decades.
What do memory cells do when the body is reinfected?
Divide rapidly into plasma cells.
