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

How can infectious diseases be prevented?

  1. By getting vaccinated

  2. By washing your hands frequently

  3. By avoiding contact with sick people

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

Infectious diseases can be prevented by getting vaccinated, washing your hands frequently, avoiding contact with sick people, and other preventive measures.

Multiple choice

Which vaccine is recommended for adolescents aged 11-12 years?

  1. HPV vaccine

  2. Tdap vaccine

  3. Meningococcal vaccine

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

The HPV vaccine protects against human papillomavirus, which can cause cervical cancer, vaginal cancer, vulvar cancer, and anal cancer. The Tdap vaccine protects against tetanus, diphtheria, and pertussis (whooping cough). The meningococcal vaccine protects against meningococcal disease, which can cause meningitis and sepsis.

Multiple choice

Which vaccine is recommended for adolescents who are sexually active?

  1. HPV vaccine

  2. Hepatitis B vaccine

  3. Meningococcal vaccine

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

The HPV vaccine protects against human papillomavirus, which can cause cervical cancer, vaginal cancer, vulvar cancer, and anal cancer. The hepatitis B vaccine protects against hepatitis B, which can cause liver damage. The meningococcal vaccine protects against meningococcal disease, which can cause meningitis and sepsis.

Multiple choice

Which vaccine is recommended for adolescents who travel to countries where meningococcal disease is common?

  1. HPV vaccine

  2. Hepatitis B vaccine

  3. Meningococcal vaccine

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

The meningococcal vaccine protects against meningococcal disease, which can cause meningitis and sepsis. Meningococcal disease is more common in certain countries, such as sub-Saharan Africa, South America, and Southeast Asia.

Multiple choice

What is the recommended immunization to prevent pneumococcal pneumonia in children?

  1. Pneumococcal Conjugate Vaccine (PCV)

  2. Haemophilus influenzae type b (Hib) Vaccine

  3. Measles, Mumps, and Rubella (MMR) Vaccine

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

The Pneumococcal Conjugate Vaccine (PCV) is recommended to protect children against pneumococcal pneumonia and other invasive pneumococcal diseases.

Multiple choice

Which type of antibody is responsible for the initial response to an infection?

  1. IgM

  2. IgG

  3. IgA

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

IgM is the first antibody produced in response to an infection. It is a large antibody that is effective in neutralizing pathogens.

Multiple choice

What is the role of IgG antibodies in the immune system?

  1. To provide long-term immunity

  2. To activate complement proteins

  3. To neutralize toxins

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

IgG antibodies are the most abundant type of antibody in the blood. They provide long-term immunity by binding to pathogens and preventing them from infecting cells.

Multiple choice

Which antibody is responsible for protecting mucosal surfaces, such as the lining of the respiratory and digestive tracts?

  1. IgA

  2. IgG

  3. IgM

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

IgA antibodies are found in mucosal secretions, such as saliva, tears, and breast milk. They protect mucosal surfaces from infection by binding to pathogens and preventing them from attaching to cells.

Multiple choice

Which antibody is responsible for protecting newborns from infection?

  1. IgG

  2. IgA

  3. IgM

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

IgG antibodies can cross the placenta from the mother to the fetus, providing the newborn with passive immunity against infections.

Multiple choice

What is the role of antibodies in vaccination?

  1. To provide active immunity

  2. To neutralize toxins

  3. To activate complement proteins

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

Vaccination works by introducing a weakened or inactivated form of a pathogen into the body. This allows the immune system to produce antibodies against the pathogen without causing disease. This provides active immunity, which means that the body is able to protect itself from future infection by the same pathogen.

Multiple choice

Which type of antibody is used in passive immunotherapy?

  1. Monoclonal antibodies

  2. Polyclonal antibodies

  3. IgM antibodies

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

Passive immunotherapy involves the administration of antibodies to provide immediate protection against an infection or disease. Monoclonal antibodies are often used in passive immunotherapy because they are highly specific and effective.

Multiple choice

What are some of the things that can be done to reduce the risk of animal-borne diseases?

  1. Vaccinating animals

  2. Practicing good hygiene

  3. Avoiding contact with wild animals

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

There are a number of things that can be done to reduce the risk of animal-borne diseases, including vaccinating animals, practicing good hygiene, avoiding contact with wild animals, and cooking meat thoroughly.

Multiple choice

Which type of immune response is responsible for recognizing and attacking specific pathogens?

  1. Innate immune response

  2. Adaptive immune response

  3. Humoral immune response

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

The adaptive immune response is responsible for recognizing and attacking specific pathogens through the production of antibodies and activation of T 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 exposure to pathogens, while passive immunity is acquired through exposure to antibodies.

  4. Active immunity is acquired through exposure to antibodies, while passive immunity is acquired through exposure to pathogens.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Active immunity is acquired through exposure to pathogens, which stimulates the immune system to produce antibodies and T cells. Passive immunity is acquired through exposure to antibodies, which provide temporary protection against specific pathogens.

Multiple choice

What is herd immunity?

  1. The immunity of a population to a disease

  2. The immunity of an individual to a disease

  3. The immunity of a group of individuals to a disease

  4. The immunity of a community to a disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Herd immunity is the immunity of a population to a disease, which occurs when a large proportion of the population is immune, either through vaccination or previous infection, providing indirect protection to those who are not immune.