Collection: Immune System Blood Tests

A white blood cell differential measures the five main types of immune cells — neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Abnormalities can indicate infection, inflammation, allergic response, immune deficiency, or more serious blood conditions.

Immunoglobulins are antibody proteins produced by the immune system. Low levels suggest immune deficiency and increased susceptibility to infection. Elevated levels can indicate chronic infection, autoimmune activity, or certain blood cancers. IgE is specifically elevated in allergic conditions.

Yes. Low immunoglobulin levels, reduced white blood cell subsets, and specific lymphocyte deficiencies can all indicate primary or secondary immune deficiency. These conditions leave people vulnerable to recurrent or unusually severe infections and require specialist investigation.

Sleep is the single most important factor — chronic sleep deprivation significantly impairs immune cell production and antibody response. Nutritional status particularly zinc, selenium, vitamin D, and vitamin C, along with stress levels, exercise, and gut health all substantially influence immune function.