54. How Vaccines Are Made

What is the main purpose of a vaccine, according to the essay?
1. To cure people after they have already gotten sick.
2. To train the immune system to fight germs without causing serious illness.
3. To kill all viruses and bacteria inside the human body.
4. To replace the need for doctors and nurses.
During the initial research phase, what do scientists try to understand?
1. How to package and ship the vaccine safely.
2. The cost of producing the vaccine on a large scale.
3. How the disease spreads and how the immune system reacts.
4. The exact number of people who have the disease.
Which of the following is NOT mentioned in the essay as a method used to create a vaccine?
1. Using a weak or dead form of the virus.
2. Using genetic instructions like mRNA.
3. Using only pieces of the germ, like proteins.
4. Using a strong, live version of the bacteria.
Before a vaccine is approved for public use, it is tested on people in a series of steps called:
1. Quality control checks.
2. Health authority reviews.
3. Laboratory analyses.
4. Clinical trials.
The essay emphasizes that safety is a priority throughout the process. Which detail best supports this claim?
1. Vaccines have saved millions of lives.
2. The production process is long and careful.
3. Vaccines are given to people by doctors or nurses.
4. Each batch of vaccine is tested many times for purity and safety.