1.6 pt.2 - Les vaccins et allergies Flashcards
How does a vaccine work?
It consists of a dead or weak virus, in which the immune system gathers the antigene of the virus and makes lots of anticorps and memory B cells. Then, when a real version of the same virus comes into the body you are more prepared.
What did Edward Jenner find?
He found that it was possible to provide a person with preventive protection against small pox.
What did the works of Louis Pasteur find?
He found that injecting a weaker microbe could prevent development of the original microbe.
What are some ways to make vaccines?
Using dead pathogens
anatoxine ( a toxine made by the pathogen)
Live bacteria atténuées par
un système de cultures (disabled by a system of cultures)
An antigene capable of provoking a response
What are some new strategies?
Using DNA to trigger a response
What are the limits of vaccines?
The antigenes of a specific virus can change over time like the flu virus. As a result, we would have to make new vaccines every year for the flu as it is always changing.
What does VIH do?
It attacks the T cells, essentially disarming the immune system (SDIA)
What provokes allergies
Allergenes
What are allergies?
An overreaction of the immune system
What are the two rules to vaccinate a community?
Vaccinate the people who are most likely get the virus
It is considered that the disease will not spread when the probability that an individual
infected or in contact with a non-immune individual is very low.
Why don’t we need to vaccinate the entire population?
Because it is considered that the disease will not spread when the probability that an individual
infected or in contact with a non-immune individual is very low.
