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 that pathogen
• Why do we only catch chickenpox once?

  Because we develop immunity after the first infection
• What is the problem with naturally catching diseases?

  It can range from unpleasant to lethal
• What do vaccines allow us to do?

  Expose ourselves to pathogens without catching diseases
• What do vaccines contain?

  Weakened or inactivated pathogens
• How does the body respond to the weakened pathogens 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
• How have vaccines helped control diseases?

  By preventing outbreaks and controlling common diseases
• What is herd immunity?

  When enough people are immune to a pathogen
• What happens to a pathogen when enough people are immune?

  It won't have people to spread to
• What are the common problems with vaccines?

  They don't always work or cause bad reactions
• What do we check after receiving important vaccines?

  If the vaccine has been effective
• What are some common reactions to vaccines?

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

  They are pretty rare
• What is the severity of severe reactions to vaccines?

  They are super rare
• What are the pros and cons of vaccines?

  Pros:

  • Protect against horrible diseases
  • Control common diseases
  • Prevent epidemics through herd immunity

  
  

  Cons:

  • Not always effective
  • Possible bad reactions