GCSE Biology - Vaccinations | How Vaccines Work

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*** WHAT'S COVERED ***
1. How the immune system develops immunity after exposure to pathogens.
* The concept that you often only catch certain diseases once (e.g., chickenpox).
2. The mechanism of vaccines.
* Introduction of weakened or inactivated pathogens.
* Stimulation of antibody production without causing the disease.
3. Examples of diseases controlled by vaccines.
* Bacterial and viral diseases.
4. Pros of vaccination.
* Individual protection from diseases.
* Control of common diseases (e.g., polio, smallpox, measles, whooping cough).
* Prevention of epidemics.
5. The concept of herd immunity.
* How vaccinating a large proportion of a population protects unvaccinated individuals.
6. Cons of vaccination.
* Vaccines don't always grant full immunity.
* Potential for bad reactions (e.g., swelling, fever, seizures), though severe reactions are rare.

*** CHAPTERS ***
0:00 Natural Immunity & Catching Diseases Once
0:51 How Vaccines Work: Weakened Pathogens & Antigens
1:16 Examples of Vaccine Coverage
1:37 Pros of Vaccination: Disease Protection & Control
1:55 Pros: Preventing Epidemics
2:08 Pros: Herd Immunity
2:34 Cons of Vaccination: Not Always Working
2:52 Cons: Bad Reactions (Swelling, Fevers, Seizures)

*** PLAYLISTS ***










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