Reading Practice: "What is a vaccine?"

In paragraph 1, which word is NOT defined?

• vaccine

• antigens

• immune system

• secondary response

The word "it" (highlighted yellow) (paragraph 1, line 10) refers to ...

• memory

• the disease

• the body

• the real pathogen

In this sentence, the "competition" is compared with the ...

• vaccinated body

• defenses

• bona fide

• disease

How many types of vaccines are mentioned in paragraph 2?

• 3

• 4

• 5

• 6

Which kind of vaccine has not yet been launched on the market?

• live attenuated vaccines

• inactivated vaccines

• DNA-based vaccines

• subunit vaccines

Write NO MORE THAN TWO WORDS:

After the antigens are injected into the body, first the immune system is triggered, and then the ..... are formed to recognize the antigens.

A person's first interaction with a vaccine is called a .....

Write NO MORE THAN TWO WORDS:

When a person comes into contact with an actual disease, his or her ..... can react to the infection more successfully.

Write NO MORE THAN TWO WORDS:

Some vaccines use live but weakened viruses while others are formulated with viruses that are dormant or .....

Write NO MORE THAN TWO WORDS:

According to healthcare experts, all types of vaccines are harmless and help to avoid diseases that are ..... deadly.