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

What is the herd immunity threshold?

  1. The percentage of a population that needs to be vaccinated to achieve herd immunity

  2. The percentage of a population that is immune to a disease

  3. The percentage of a population that has been exposed to a disease

  4. The percentage of a population that has recovered from a disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The herd immunity threshold is the percentage of a population that needs to be vaccinated to achieve herd immunity, which is the point at which the spread of a disease is stopped because there are not enough susceptible individuals to maintain transmission.

Multiple choice

Which of the following is NOT a recommended childhood vaccine?

  1. MMR

  2. Polio

  3. Hepatitis A

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

Influenza is not a recommended childhood vaccine. It is recommended for certain high-risk groups, such as young children, the elderly, and people with chronic health conditions.

Multiple choice

Which of the following is NOT a type of herd immunity?

  1. Natural herd immunity

  2. Vaccine-induced herd immunity

  3. Community herd immunity

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

Community herd immunity is not a type of herd immunity. It is a term used to describe the level of herd immunity in a specific community.

Multiple choice

Which of the following is not a vaccine-preventable disease?

  1. Measles

  2. Mumps

  3. Rubella

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

Polio is not a vaccine-preventable disease, as there is no vaccine available for polio.

Multiple choice

Which of the following is a vaccine-preventable disease?

  1. Measles

  2. Mumps

  3. Rubella

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

Measles, mumps, and rubella are all vaccine-preventable diseases. Vaccines are a safe and effective way to protect against these diseases.

Multiple choice

What is the role of antibodies in the immune response to antigens?

  1. To neutralize toxins and pathogens

  2. To activate complement proteins

  3. To opsonize antigens for phagocytosis

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

Antibodies play a variety of roles in the immune response to antigens, including neutralizing toxins and pathogens, activating complement proteins, and opsonizing antigens for phagocytosis.

Multiple choice

What is the role of memory cells in the immune response to antigens?

  1. To provide long-term protection against infection

  2. To produce antibodies against antigens

  3. To activate T cells

  4. To destroy infected cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Memory cells are long-lived cells that provide long-term protection against infection by rapidly responding to re-exposure to the same antigen.

Multiple choice

What is the difference between active immunity and passive immunity?

  1. Active immunity is acquired through infection or vaccination, while passive immunity is acquired through the transfer of antibodies or T cells from another individual

  2. Active immunity is long-lived, while passive immunity is short-lived

  3. Active immunity is more effective against intracellular pathogens, while passive immunity is more effective against extracellular pathogens

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

Active immunity is acquired through infection or vaccination, while passive immunity is acquired through the transfer of antibodies or T cells from another individual. Active immunity is long-lived, while passive immunity is short-lived. Active immunity is more effective against intracellular pathogens, while passive immunity is more effective against extracellular pathogens.

Multiple choice

What is the role of vaccines in the immune response to antigens?

  1. To stimulate the production of antibodies and T cells against a specific pathogen

  2. To provide long-term protection against infection

  3. To reduce the severity of disease

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

Vaccines stimulate the production of antibodies and T cells against a specific pathogen, providing long-term protection against infection and reducing the severity of disease.

Multiple choice

What is the role of antigens in the immune response?

  1. To produce antibodies

  2. To destroy infected cells

  3. To activate immune cells

  4. To cause allergic reactions
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Antigens are molecules that trigger an immune response by activating immune cells, such as lymphocytes, to recognize and attack foreign invaders.

Multiple choice

What is the purpose of vaccination?

  1. To treat infections

  2. To prevent infections

  3. To boost energy levels

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

Vaccination introduces a weakened or inactivated form of a pathogen into the body, allowing the immune system to develop immunity without causing illness.

Multiple choice

Which type of immune response is responsible for long-term immunity?

  1. Innate immunity

  2. Adaptive immunity

  3. Humoral immunity

  4. Cell-mediated immunity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adaptive immunity, specifically through memory cells, provides long-term immunity by remembering and responding to specific pathogens encountered in the past.

Multiple choice

What is the difference between active and passive immunity?

  1. Active immunity is long-term, while passive immunity is short-term.

  2. Active immunity is acquired through vaccination, while passive immunity is acquired through infection.

  3. Active immunity involves the production of antibodies, while passive immunity involves the transfer of antibodies.

  4. Active immunity is more effective than passive immunity.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Active immunity is acquired through exposure to an antigen, leading to the production of antibodies by the immune system, while passive immunity is acquired through the transfer of antibodies from another individual.

Multiple choice

Which type of immune response is responsible for immediate protection against infections?

  1. Innate immunity

  2. Adaptive immunity

  3. Humoral immunity

  4. Cell-mediated immunity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Innate immunity provides immediate protection against infections through physical barriers, chemical mediators, and phagocytic cells, without the need for prior exposure to the pathogen.

Multiple choice

What is the primary purpose of vaccination?

  1. To cure infectious diseases

  2. To prevent infectious diseases

  3. To treat symptoms of infectious diseases

  4. To boost the immune system
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vaccination works by introducing a weakened or inactivated form of a pathogen into the body, allowing the immune system to develop antibodies against it without causing illness.