Thymus gland
Step-by-step explanation:
- Thymus is a primary lymphoid organ where T cells mature, T cells mature in the cortex and migrate to medulla
- T cells do not produce antibodies, when antigen presenting cells bring antigens in the secondary lymphoid organ, T cells helps in their elimination
- There are two types of T cells: T helper cells and T-cytotoxic cells
- T helper cells carries membrane protein on surface and provides defense against both extracellular and intracellular pathogens
- T cytotoxic cells is the carrier of surface protein and provides defense against intracellular pathogens
So, baby Phelps was placed in strict isolation because it plays a vital role in protecting the baby's immune system