Gram-stained section of a macrophage with ingested S epidermidis bacteria, seen as purple granules within its cytoplasm. In this stain, the nucleus appears pale, with a reddish nucleolus. It is ...

Within tumors in the human body, there are immune cells (macrophages) capable of fighting cancer, but they have been unable to perform their roles properly due to suppression by the tumor. A KAIST ...