Biology ยท General Awareness

Vaccination and Immunity

997 Questions

This hub presents questions focused on vaccination and human immunity. It covers essential topics such as herd immunity, non-specific immunity, antigens, and historical vaccine developments. These concepts are crucial for general science sections in medical and civil service exams.

Herd immunity functionsNon-specific immunitySmallpox vaccinationInterferon proteinsAntigen propertiesImmunological amnesia

Vaccination and Immunity Questions

Multiple choice

Which vaccine is recommended for toddlers at 12-15 months of age?

  1. MMR

  2. DTaP

  3. Hib

  4. Hepatitis A
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The MMR vaccine protects against measles, mumps, and rubella. It is recommended for toddlers at 12-15 months of age.

Multiple choice

How many doses of the Hib vaccine are recommended for toddlers?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Three doses of the Hib vaccine are recommended for toddlers. The first dose is given at 2 months of age, the second dose at 4 months of age, and the third dose at 6 months of age.

Multiple choice

Which vaccine is recommended for toddlers at 18 months of age?

  1. MMR

  2. DTaP

  3. Hib

  4. Hepatitis A
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The DTaP vaccine is recommended for toddlers at 18 months of age. It is a booster dose that protects against diphtheria, tetanus, and pertussis (whooping cough).

Multiple choice

How many doses of the Hepatitis B vaccine are recommended for toddlers?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Three doses of the Hepatitis B vaccine are recommended for toddlers. The first dose is given at birth, the second dose at 1-2 months of age, and the third dose at 6-18 months of age.

Multiple choice

Which vaccine is recommended for toddlers at 4-6 years of age?

  1. MMR

  2. DTaP

  3. Hib

  4. Hepatitis A
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The MMR vaccine is recommended for toddlers at 4-6 years of age. It is a booster dose that protects against measles, mumps, and rubella.

Multiple choice

How many doses of the Meningococcal vaccine are recommended for toddlers?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Two doses of the Meningococcal vaccine are recommended for toddlers. The first dose is given at 11-12 years of age, and the second dose is given at 16-18 years of age.

Multiple choice

Which vaccine is recommended for toddlers at 13-16 years of age?

  1. MMR

  2. DTaP

  3. Hib

  4. Hepatitis A
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The MMR vaccine is recommended for toddlers at 13-16 years of age. It is a booster dose that protects against measles, mumps, and rubella.

Multiple choice

How many doses of the HPV vaccine are recommended for toddlers?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Two doses of the HPV vaccine are recommended for toddlers. The first dose is given at 9-12 years of age, and the second dose is given 6-12 months later.

Multiple choice

Which vaccine is recommended for toddlers at 19-26 years of age?

  1. MMR

  2. DTaP

  3. Hib

  4. Hepatitis A
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The MMR vaccine is recommended for toddlers at 19-26 years of age. It is a booster dose that protects against measles, mumps, and rubella.

Multiple choice

How many doses of the Tdap vaccine are recommended for toddlers?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

One dose of the Tdap vaccine is recommended for toddlers at 11-12 years of age.

Multiple choice

The Global Vaccine Alliance (Gavi) is a global health partnership that aims to:

  1. Increase access to vaccines in developing countries

  2. Develop new vaccines for neglected diseases

  3. Strengthen health systems in low-income countries

  4. Promote research on vaccine safety and efficacy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Global Vaccine Alliance (Gavi) is a global health partnership that aims to increase access to vaccines in developing countries, with a focus on reaching the poorest and most vulnerable populations.

Multiple choice

The X is a global health initiative that aims to accelerate the development and delivery of vaccines for neglected diseases.

  1. Global Vaccine Alliance (Gavi)

  2. World Health Organization (WHO)

  3. Product Development Partnership (PDP)

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Product Development Partnership (PDP) is a global health initiative that aims to accelerate the development and delivery of vaccines for neglected diseases.

Multiple choice

Which type of immunotherapy involves genetically modifying T cells to express a receptor that targets a specific antigen on cancer cells?

  1. Adoptive T-cell therapy

  2. Checkpoint inhibitors

  3. Cancer vaccines

  4. Cytokine therapy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adoptive T-cell therapy involves genetically engineering T cells to express a receptor that recognizes a specific antigen on cancer cells, enabling them to effectively target and destroy cancer cells.

Multiple choice

What is the mechanism of action of checkpoint inhibitors in immunotherapy?

  1. They block inhibitory receptors on T cells, releasing the brakes on the immune response

  2. They directly kill cancer cells by inducing apoptosis

  3. They stimulate the production of antibodies against cancer cells

  4. They enhance the ability of natural killer cells to recognize and attack cancer cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Checkpoint inhibitors work by blocking inhibitory receptors on T cells, such as PD-1 and CTLA-4, which normally prevent T cells from attacking healthy cells. By releasing these brakes, checkpoint inhibitors allow T cells to become more active and effectively target cancer cells.

Multiple choice

What is the primary target of cancer vaccines in immunotherapy?

  1. Cancer cells themselves

  2. Immune cells such as T cells and B cells

  3. Tumor-associated antigens

  4. Cancer-promoting proteins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cancer vaccines aim to stimulate the immune system to recognize and attack tumor-associated antigens, which are molecules expressed on cancer cells that are not found on healthy cells.