WONDER #2283: How Are Vaccines Made?

Question 1 of 3

Vaccines using weakened viruses usually reproduce fewer than how many times?

  1. 5
  2. 10
  3. 15
  4. 20

Question 2 of 3

Influenza and rabies vaccines are made using completely inactivated what?

  1. ingredients
  2. viruses
  3. red blood cells
  4. fat cells

Question 3 of 3

Because the immune response from some vaccines may decrease over time, vaccines known as what are sometimes given to restore the immune response?

  1. boosters
  2. updates
  3. downloads
  4. upvacs

Check your answers online at https://wonderopolis.org/wonder/how-are-vaccines-made.