Certified Breastfeeding Counselor (CBC) Practice

Which living cells are destroyed in human milk by freezing?

1. IgA

2. Macrophages

3. T cells

4. B cells

The correct answer is: Macrophages

Macrophages are a type of living cell that are present in human milk. Freezing can destroy or damage these cells, making them less effective in providing immune protection to the infant. The other options, IgA, T cells, and B cells, are also present in human milk but are not destroyed by freezing. IgA is a type of antibody that provides a passive form of immunity, while T cells and B cells are involved in the body's adaptive immune response. While these cells may not be destroyed by freezing, their function may still be impacted by the freezing process. Therefore, the most accurate answer is B.