Unit 8 Immunization exercises

I. Fill in the blanks with the correct form of the word in parentheses. (Điền vào chỗ trống với dạng đúng của từ trong ngoặc)

1. Immunization __________ (stimulate) resistance in the human body to specific diseases.
2. These treated microorganisms __________ (not/cause) the disease, but they trigger the immune system.
3. In 1980, smallpox __________ (eradicate) worldwide due to a successful vaccination program.
4. Many diseases __________ (eliminate) in developed countries through vaccination.
5. By 1988, a new vaccine __________ (introduce) to prevent hemophilus influenzae type B meningitis.
6. The immune system __________ (recognize) antigens as foreign substances.
7. Some immunizing agents __________ (require) repeated booster shots.
8. Passive immunization __________ (perform) without injecting any antigen.
9. The risk of side effects __________ (reduce) due to modern vaccine development.
10. Health authorities __________ (recommend) that adults over 65 get vaccinated against influenza.

II. Choose the correct answer. (Chọn đáp án đúng)

11. Immunization is a method of __________ resistance in the human body.
    a) stimulate
    b) stimulated
    c) stimulating
    d) stimulation
12. The immune system __________ respond immediately if a person is exposed to a disease after vaccination.
    a) was able to
    b) is able to
    c) has been able to
    d) will be able to
13. Passive immunization __________ immediate but temporary protection.
    a) provides
    b) providing
    c) is providing
    d) provided
14. If a person __________ vaccinated, they may still contract the disease but in a milder form.
    a) has
    b) have
    c) is
    d) was
15. The vaccine for measles __________ introduced in 1963.
    a) is
    b) was
    c) has been
    d) will be

III. Rewrite the following sentences using the given words. (Viết lại câu với từ gợi ý)

16. Scientists introduced a vaccine for hemophilus influenzae type B in 1988. (Use passive voice)
    ➡ A vaccine for hemophilus influenzae type B __________ in 1988.
17. The immune system develops antibodies in response to an antigen. (Begin with “Antibodies…”)
    ➡ Antibodies __________ in response to an antigen.
18. Some vaccines require booster shots. (Use “necessary”)
    ➡ Booster shots __________ for some vaccines.
19. Health authorities recommend a second measles vaccine dose. (Use passive voice)
    ➡ A second measles vaccine dose __________ by health authorities.
20. Scientists are developing genetically altered vaccines. (Use passive voice)
    ➡ Genetically altered vaccines __________ by scientists.

IV. Identify and correct the mistake in each sentence. (Tìm và sửa lỗi sai)

21. Many diseases has been eliminated thanks to vaccination.
    ➡ _______________
22. The immune system responds defensive to antigens.
    ➡ _______________
23. Booster shots are recommend for some vaccines.
    ➡ _______________
24. Immunization can takes weeks to develop full protection.
    ➡ _______________
25. A vaccine against measles were introduced in 1963.
    ➡ _______________

V. Complete the sentences using conditionals. (Hoàn thành câu với câu điều kiện)

26. If a person __________ (not/get) vaccinated, they might contract the disease.
27. If new vaccines __________ (not/develop), some diseases would still be common.
28. The immune system will respond quickly if it __________ (recognize) an antigen.
29. If people had not been vaccinated against smallpox, it __________ (not/disappear).
30. If you __________ (receive) a tetanus shot every ten years, you will be protected.