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 was the name of the vaccine developed in the 1950s that eradicated polio in many parts of the world?

  1. Polio vaccine

  2. Measles vaccine

  3. Rubella vaccine

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

The polio vaccine, developed by Jonas Salk in the 1950s, was a major breakthrough in the fight against polio, leading to its eradication in many parts of the world.

Multiple choice

Which type of immune response is mediated by antibodies?

  1. Cell-mediated immunity

  2. Humoral immunity

  3. Innate immunity

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

Humoral immunity is the antibody-mediated immune response. It involves the production of antibodies by B cells and plasma cells in response to the presence of an antigen. Antibodies bind to antigens, marking them for destruction by other components of the immune system.

Multiple choice

Which type of immune response is innate and does not require prior exposure to an antigen?

  1. Cell-mediated immunity

  2. Humoral immunity

  3. Innate immunity

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

Innate immunity is the first line of defense of the immune system and does not require prior exposure to an antigen. It involves physical barriers, such as the skin and mucous membranes, as well as chemical barriers, such as antimicrobial peptides and proteins.

Multiple choice

Which type of immune response is adaptive and requires prior exposure to an antigen?

  1. Cell-mediated immunity

  2. Humoral immunity

  3. Innate immunity

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

Adaptive immunity is the second line of defense of the immune system and requires prior exposure to an antigen. It involves the activation of B cells and T cells, which recognize and respond to specific antigens.

Multiple choice

In the SIR model, what does the S compartment represent?

  1. Susceptible individuals.

  2. Infected individuals.

  3. Recovered individuals.

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

The SIR model is a compartmental model that divides the population into three compartments: Susceptible, Infected, and Recovered. S represents the number of individuals who are susceptible to the disease and can become infected.

Multiple choice

What is the herd immunity threshold?

  1. The proportion of the population that needs to be vaccinated in order to achieve herd immunity.

  2. The proportion of the population that is immune to a disease, either through vaccination or natural infection.

  3. The proportion of the population that is susceptible to a disease.

  4. The proportion of the 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 proportion of the population that needs to be immune to a disease in order to stop its spread. This threshold is determined by the basic reproductive number R0 of the disease.

Multiple choice

What is the role of vaccination in controlling the spread of infectious diseases?

  1. Vaccination is the process of introducing a weakened or killed form of a pathogen into the body in order to stimulate the immune system to produce antibodies against the pathogen.

  2. Vaccination is the process of introducing a weakened or killed form of a pathogen into the body in order to stimulate the immune system to produce antibodies against the pathogen and prevent infection.

  3. Vaccination is the process of introducing a weakened or killed form of a pathogen into the body in order to stimulate the immune system to produce antibodies against the pathogen and treat infection.

  4. Vaccination is the process of introducing a weakened or killed form of a pathogen into the body in order to stimulate the immune system to produce antibodies against the pathogen and test for infection.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vaccination is an important public health measure that can help to control the spread of infectious diseases. By stimulating the immune system to produce antibodies against a particular pathogen, vaccination can help to protect individuals from infection.

Multiple choice

What is the difference between a vaccine and a treatment for an infectious disease?

  1. A vaccine is a weakened or killed form of a pathogen that is introduced into the body in order to stimulate the immune system to produce antibodies against the pathogen, while a treatment is a drug or other intervention that is used to treat the symptoms of a disease.

  2. A vaccine is a weakened or killed form of a pathogen that is introduced into the body in order to stimulate the immune system to produce antibodies against the pathogen and prevent infection, while a treatment is a drug or other intervention that is used to treat the symptoms of a disease and prevent infection.

  3. A vaccine is a weakened or killed form of a pathogen that is introduced into the body in order to stimulate the immune system to produce antibodies against the pathogen and prevent infection, while a treatment is a drug or other intervention that is used to treat the symptoms of a disease and cure infection.

  4. A vaccine is a weakened or killed form of a pathogen that is introduced into the body in order to stimulate the immune system to produce antibodies against the pathogen and prevent infection, while a treatment is a drug or other intervention that is used to treat the symptoms of a disease and test for infection.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

A vaccine is a weakened or killed form of a pathogen that is introduced into the body in order to stimulate the immune system to produce antibodies against the pathogen and prevent infection. A treatment is a drug or other intervention that is used to treat the symptoms of a disease.

Multiple choice

What is the role of IgM antibodies in the immune response?

  1. They are the first antibodies produced in response to an infection

  2. They are involved in memory responses

  3. They activate complement proteins

  4. They bind to Fc receptors on immune cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IgM antibodies are the first antibodies produced in response to an infection. They are large, multimeric antibodies that can activate complement proteins and bind to Fc receptors on immune cells.

Multiple choice

What is the difference between active and passive immunity?

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

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

  3. Active immunity is acquired through contact with an antigen, while passive immunity is acquired through contact with an antibody

  4. Active immunity is acquired through contact with an antibody, while passive immunity is acquired through contact with an antigen
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Active immunity is acquired when the body produces its own antibodies in response to an infection or vaccination. Passive immunity is acquired when antibodies are transferred from one individual to another, either through the placenta or through blood transfusions.

Multiple choice

What is the role of antibodies in cancer immunotherapy?

  1. They help to target and destroy cancer cells

  2. They help to activate the immune response against cancer cells

  3. They help to suppress the immune response against cancer cells

  4. They help to produce cytokines
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antibodies can be used in cancer immunotherapy to target and destroy cancer cells. They can be engineered to bind to specific antigens on cancer cells and deliver toxic payloads or activate the immune system against the cancer cells.

Multiple choice

What is the role of the MHC in vaccine development?

  1. To prevent vaccines

  2. To promote vaccines

  3. To regulate blood pressure

  4. To control body temperature
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The MHC plays a crucial role in vaccine development by presenting antigens from vaccines to immune cells, which can lead to an immune response against the disease that the vaccine is designed to prevent.

Multiple choice

Which of the following is a sexually transmitted infection (STI) that can be prevented by getting vaccinated?

  1. Chlamydia

  2. Gonorrhea

  3. Human papillomavirus (HPV)

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

Human papillomavirus (HPV) is a sexually transmitted infection (STI) that can be prevented by getting vaccinated. Chlamydia, gonorrhea, and syphilis are all sexually transmitted infections that cannot be prevented by getting vaccinated.

Multiple choice

Which herbal remedy is commonly used to support the immune system and reduce the risk of colds and flu?

  1. Echinacea

  2. Ginkgo biloba

  3. Peppermint

  4. St. John's wort
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Echinacea is a popular herbal remedy known for its immune-boosting properties and is often used to prevent and treat colds and flu.

Multiple choice

Which medical research breakthrough led to the development of vaccines that have significantly reduced the incidence of infectious diseases?

  1. Discovery of Antibiotics

  2. Germ Theory of Disease

  3. Development of Microscopes

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

The Germ Theory of Disease, proposed by Louis Pasteur and Robert Koch, revolutionized medical research by establishing the link between microorganisms and infectious diseases. This led to the development of vaccines, which have played a pivotal role in reducing the prevalence of infectious diseases and improving public health.