What occurs during a primary immune response?

Which of the following is an example of active immunity?

Which type of immunity mainly involves the action of B cells?

Which of the following statements correctly describes a similarity and a difference between passive immunity and active immunity?

What is the primary function of the adaptive immune system?

What type of immunity uses helper cells and killer cells to identify and destroy abnormal cells?

Which two main components are included in the adaptive immune response?

Which of these is an example of active immunity?