This month in Cell Stress: Metabolic stress in antitumor immune response. Scanning electron micrograph of human T lymphocytes from the immune system of a healthy donor. Credit: NIAID. Background image from page 239 of “Ciba Foundation Symposium on the Regulation of Cell Metabolism” (1959, public domain). Image modified by Cell Stress. The cover is published under the CC BY 4.0 license.