IMMUNOLOGY

Detailed explanation-1: -During the last 3 months of pregnancy, antibodies from mothers are passed to their unborn babies through the placenta. This type of immunity is called passive immunity because the baby has been given antibodies rather than making them itself.

Detailed explanation-2: -Passive immunity provides immediate but short-lived protection, lasting several weeks up to 3 or 4 months. Passive immunity can occur naturally, when maternal antibodies are transferred to the fetus through the placenta or from breast milk to the gut of the infant.

Detailed explanation-3: -Passive immunity. Each baby’s passive immunity is unique because each mother’s immune system is unique. The exact kinds and amounts of antibodies in a baby’s blood are a reflection of its mother’s levels at birth. These differences can impact how long passive immunity lasts.

Detailed explanation-4: -It also can occur artificially when antibodies that protect against specific pathogens are transferred, often via blood or plasma transfusion. Antibodies obtained from a source such as blood will include a mixture of variations, which arise as part of a natural immune response.