The yellowish fluid "colostrum" secreted by mammary glands of the mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. This type of immunity is called as:
1. | Passive immunity | 2. | Active immunity |
3. | Acquired immunity | 4. | Autoimmunity |
Colostrum, the yellowish fluid, secreted by the mother during the initial days of lactation is very essential to impart immunity to newborn infants because it contains:
1. | Immunoglobulin A | 2. | Natural killer cells |
3. | Monocytes | 4. | Macrophages |