Vaccines Flashcards
1
Q
Why do Vaccines increase antibody concentration?
A
the vaccine contains the antigen
the antigen activates T-Helper cells
T-H cells stimulate B lymphocytes to delve lip into plasma cells
plasma cells produce antibodies
2
Q
why does antigen concentration increase more quickly when an individual is infected with a pathogen after they’ve been vaccinated?
A
Memory cells remain in the blood after the vaccination
The foreign antigens are recognised more quickly and less time is needed for lymphocytes with complementary receptors to be found
3
Q
why might people be concerned about vaccination?
A
harmful side effects
concerns around animal testing
4
Q
how do vaccines work?
A
- dead or weakened antigen injected
- stimulates T-H cells to release cytokines
- cytokines stimulate production of plasma cells
- B cells release antibodies
- Some b cells become memory cells
- memory cells produce antibodies faster
