GCSE Biology - Vaccinations | How Vaccines Work скачать в хорошем качестве

GCSE Biology - Vaccinations | How Vaccines Work

⭐️ https://www.cognito.org/ ⭐️ ** 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 **    • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • Alevel Biology   #GCSE #Biology #study