Passive immunity is immunity transferred from one individual to another.

Passive immunity is immunity transferred from one individual to another.

• A. The body produces antibodies after vaccination
• B. Exposure leads to immediate immunity without antibodies
• C. The immune response is generated by own T Cells
• D. Immunity transferred from one individual to another

Answer: (D)

Passive immunity involves transferring antibodies from one person to another, giving immediate protection without the recipient needing to produce their own antibodies. This can happen when maternal antibodies cross the placenta or are present in breast milk, or when antibody-containing products like immune globulin or antivenom are given. Because the antibodies are borrowed from someone else, there’s no activation of the recipient’s own B or T cells, and the protection is temporary as the transferred antibodies are eventually cleared. This is why the statement accurately describes passive immunity. In contrast, producing antibodies after vaccination or exposure relies on the recipient’s own immune system and is a form of active immunity.

Passive immunity involves transferring antibodies from one person to another, giving immediate protection without the recipient needing to produce their own antibodies. This can happen when maternal antibodies cross the placenta or are present in breast milk, or when antibody-containing products like immune globulin or antivenom are given. Because the antibodies are borrowed from someone else, there’s no activation of the recipient’s own B or T cells, and the protection is temporary as the transferred antibodies are eventually cleared. This is why the statement accurately describes passive immunity. In contrast, producing antibodies after vaccination or exposure relies on the recipient’s own immune system and is a form of active immunity.