Question 1:

What is the primary purpose of a vaccine?

Explanation: The primary purpose of a vaccine is to prevent disease. Vaccines stimulate the immune system to recognize and respond to specific pathogens, providing protection against future infections. Therefore, option C is correct.

Question 2:

Which type of vaccine contains weakened or inactivated forms of the pathogen?

Explanation: Inactivated vaccines contain weakened or inactivated forms of the pathogen. These vaccines are unable to cause disease but can still stimulate an immune response. Therefore, option B is correct.

Question 3:

Which type of vaccine stimulates an immune response by presenting only specific parts of the pathogen?

Explanation: Subunit vaccines stimulate an immune response by presenting only specific parts of the pathogen, such as proteins or polysaccharides. This approach avoids the risk of using live or inactivated pathogens. Therefore, option C is correct.

Question 4:

Which immune cells are directly targeted by vaccines to induce a protective immune response?

Explanation: Vaccines directly target B cells and T cells to induce a protective immune response. B cells produce antibodies, while T cells recognize and destroy infected cells. Therefore, option A is correct.

Question 5:

What is the process of administering a vaccine to a large population called?

Explanation: The process of administering a vaccine to a large population is called immunization. Immunization programs aim to protect individuals and communities from infectious diseases. Therefore, option A is correct.