Which of the following is an example of active immunity?

• A. Transfer of antibodies from mother to fetus
• B. Vaccination with a live attenuated virus
• C. Receiving antibodies through breast milk
• D. Injection of immune globulin

Answer: (B)

Verified step by step guidance

1. Understand the concept of immunity: Immunity is the body's ability to resist or eliminate potentially harmful foreign materials or abnormal cells.
2. Differentiate between active and passive immunity: Active immunity involves the production of antibodies by the immune system in response to the presence of an antigen, whereas passive immunity involves the transfer of antibodies from another source.
3. Identify examples of passive immunity: Transfer of antibodies from mother to fetus and receiving antibodies through breast milk are examples of passive immunity, as they involve the direct transfer of antibodies.
4. Recognize the mechanism of active immunity: Active immunity is typically acquired through exposure to a pathogen or through vaccination, which stimulates the immune system to produce its own antibodies.
5. Apply the concept to the given options: Vaccination with a live attenuated virus is an example of active immunity because it involves introducing a weakened form of the virus to stimulate the body's immune response to produce antibodies.