What disease(s) is/are commonly associated with vitamin E deficiency?

IgG is a type of cytokine. 

Which of the following is/are (a) symptom(s) of severe vitamin E deficiency?

Which of the following is/are (a) true statement(s)?

Antibodies combat invading pathogens by:

Zn helps the immune system by:

Humoral immunity represents B and T cells.

The three principle types of T-lymphocytes are cytotoxic T-cells, helper T-cells, and regulator T-cells.

The immune system needs _____________to function properly?

Which of the following is/are (a) part of the innate immune system?