?

Question 1

What types of vaccines are there?

Answer 1

• Dead pathogens
• Live attenuated (weakened pathogens)
• Toxoids (toxins made harmless)
• DNA of pathogen
• Edible vaccines

Question 2

How does the immune system respond to a vaccine?

Answer 2

• Quickly kills and eliminates the pathogen that is introduces to the body
• Elicits a primary immune response that results in production of memory cells

Question 3

What is herd immunity?

Answer 3

• If enough members of a community are vaccinated, they will produce lots of memory cells
• If they contract the pathogen, they destroy it before numbers of pathogens in the body increase to levels that mean they may pass it on to others

Question 4

How does herd immunity protect the vulnerable?

Answer 4

Limits the likelihood they will have exposure to the pathogen