What type of immunity does passive immunity provide to the baby?

• A. Active immunity
• B. Natural immunity
• C. Passive immunity
• D. Adaptive immunity

Answer: (C)

Passive immunity provides immediate but temporary protection to the baby by transferring antibodies from another source, typically through the placenta during pregnancy or through breast milk after birth. This type of immunity is crucial for newborns, as their immune systems are still developing and they may not yet be able to produce their own antibodies effectively.

This protection is especially important in the early months of life when infants are vulnerable to infections. The antibodies that are transferred do not require the baby's immune system to initiate any response, which distinguishes passive immunity from other forms like active immunity, where the body must produce its own antibodies in response to exposure to a pathogen.

The other types of immunity mentioned are not applicable here. Active immunity involves the body's own immune response to an infection or vaccination. Natural immunity refers to the immunity acquired through natural exposure, and adaptive immunity is a broader term that encompasses both active and passive immunity, focusing on how the immune system adapts to specific pathogens. Thus, passive immunity specifically relates to the passive transfer of antibodies, making it the correct choice in this context.