NEET BIOLOGY

Detailed explanation-1: -Passive immunity. Newborn babies get passive immunity from their mothers through the placenta before they’re born. A mother shares the antibodies that she has with her unborn baby. Each baby’s passive immunity is unique because each mother’s immune system is unique.

Detailed explanation-2: -“An infant’s immune system doesn’t mature until they’re about two to three months old, ” Dr. Sabella says. “In those first few months, the immune system-especially cell-mediated immunity-becomes more developed. This is very important in helping a child fight off viruses.”

Detailed explanation-3: -Passive Immunity. Passive immunity is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system. A newborn baby acquires passive immunity from its mother through the placenta.

Detailed explanation-4: -The immune system works throughout our lives fighting germs that can cause disease. A mother’s antibodies are shared with their baby through the placenta during the third trimester (last 3 months) of pregnancy. The mother’s antibodies help protect the baby from illnesses when the baby is born.