WONDER #2283: How Are Vaccines Made?
Question 1 of 3
Vaccines using weakened viruses usually reproduce fewer than how many times?
Question 2 of 3
Influenza and rabies vaccines are made using completely inactivated what?
- red blood cells
- 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?
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