Vaccinations & Immunisation

• What is the main topic of the video?

  How vaccines work and their pros and cons
• What happens to our immune system after exposure to a pathogen?

  It generally develops immunity to the pathogen
• Why do we only catch diseases like chickenpox once?

  Because our bodies become immune after exposure
• What is the benefit of vaccines in relation to disease exposure?

  They provide immunity without catching the disease
• What do vaccines contain?

  Weakened or inactivated pathogens
• How does the body respond to the antigens in vaccines?

  By producing antibodies and developing immunity
• How many diseases are we vaccinated against by primary school?

  More than a dozen diseases
• What is the main pro of vaccines?

  They protect us from catching horrible diseases
• What larger effect do vaccines have on disease control?

  They help control diseases that were common
• What is herd immunity?

  When enough people are immune to a pathogen
• How does herd immunity affect disease spread?

  It prevents the pathogen from spreading effectively
• What happens if a few people are not vaccinated in a herd immunity scenario?

  They are unlikely to catch the disease
• What is a common problem with vaccines?

  They don't always grant full immunity
• How do we check if an important vaccine has been effective?

  By checking after the injection
• What are some bad reactions to vaccines?

  Swelling, fevers, or seizures
• How common are bad reactions to vaccines?

  They are pretty rare
• Where can you find more videos and resources on vaccines?

  On the website Cognito
• What additional resources does Cognito provide?

  Questions, flashcards, and past papers
• What does Cognito track for users?

  Your progress in studying