Basophils are the rarest type of white blood cell (WBC). Sometimes called granulocytes, the cells hold tiny granules full of histamine. Basophils can also trigger your allergic reaction. They can ...

Basophils are white blood cells that the bone marrow makes. They play a role in a healthy immune system. Levels that are higher or lower than usual may be a sign of inflammation, hyperthyroidism, or ...