My primary care physician and blood specialist say there is nothing that will increase white blood cell count. Are there supplements that I can take or foods to eat to improve the low count? -- R.J.L.

White blood cells help fight infection in the body. Medical practices can differ in how they define a low white blood cell count. There are five types of white blood cells. Neutrophils account for ...

In a recent study, Yale researchers discovered a new molecule that can temporarily boost white blood cell counts. The study, led by Nikolai Jaschke, a postdoctoral researcher in the lab of Andrew Wang ...

A simple blood test might determine which patients are at risk for long COVID, a new study says. Higher levels of leukocytes -- a form of white blood cell -- are associated with more severe symptoms ...