KA7 Flashcards
(11 cards)
How can immunity againts a pathogen be developed
By vaccination using antigens from infectious pathogens
The vaccines that contain antigen causes what
A primary response and create B and T lymphocyte memory cells
Antigens used in vaccines can be
Parts of pathogens
Weakened pathogens
Dead pathogens
Inactivated pathogens toxins
Antigens are mixed with an adjuvant to make a vaccine. 🙂 now tell me wtf is a adjuvant
A substance which makes the vaccine more effective so enchancing the immune response
Herd immunity occurs when a
Large percentage of a population is immunised
Non immune Individuals are protected
As there is a lower probability they will come into contact with infected individuals
Why is establishing here immunity important
It’s important in reducing spread of disease
The herd immunity thereshold depends on
Type of disease
Effectiveness of the vaccine
Density of population
Mass vaccination programmes are designed to
Establish herd immunity to a disease
Herd immunity may be difficult to achieve when widespread vaccination is not possible due to
Poverty in the developing world
When vaccines are rejected by a percentage of the population in the developed world
Some pathogens can change their antigens, thus means that memory cells are
Not effective againts them
