vaccines Flashcards
1
Q
what is a vaccine? how does it work?
A
Injections of antigens into the body
- Antigen is dead of attenuated (allows the body to create an immune response so that memory cells are made)
Sometimes a booster shot is required to create more memory cells
2
Q
4 types of vaccines
A
- Live attenuated micro-organisms
- Dead micro-organisms
- Toxoid
- Sub-unit
3
Q
the hygiene hypothesis
A
A lack of early childhood exposure to pathogens increases vulnerability to allergic diseases by suppressing the natural development of immune system
4
Q
herd immunity
A
If majority of population is immune to a disease, the spread of the disease will be slowed or stopped as it is unable to be transmitted
