Vitamin deficiencies and infections caused by viruses and other pathogens often coexist and exhibit complex interactions. Malnutrition, vitamin A deficiency and infections among populations of the developing countries, these are the leading cause of death, particularly in children. Several micronutrients were in study, vitamin A deficiency is strongly involved in measles and diarrhea. There are also some scientific data against this thesis. These vitamins, virus infection and immune function interactions are briefly reviewed in this article.