ANATOMY

Detailed explanation-1: -A type of immunity that occurs when a person is given antibodies rather than making them through his or her own immune system. For example, passive immunity occurs when a baby receives a mother’s antibodies through the placenta or breast milk.

Detailed explanation-2: -Breast milk also contains antibodies, which means that babies who are breastfed have passive immunity for longer. The thick yellowish milk (colostrum) produced for the first few days following birth is particularly rich in antibodies.

Detailed explanation-3: -Breastfeeding provides passive and likely long-lasting active immunity.

Detailed explanation-4: -Specifically, breast milk contains the immunoglobulins IgA, IgM, IgG and secretory versions of IgM (SIgM) and IgA (SIgA). Colostrum in particular includes high amounts of SIgA, which protects a baby by forming a protective layer in their nose, throat, and throughout their digestive system.

Detailed explanation-5: -Colostrum antibodies are described for passive immunity protection in animals such as calves. Chicken egg antibodies are another source of antibodies for passive immunity.