Cell Membrane - A semipermeable barrier that separates the interior of a cell from the external environment.⏎
Category A Agents - A class of biological agents that the Centers for Disease Control and Prevention views as posing the highest priority risk to U.S. national security.⏎
Cancer - A class of diseases in which abnormal cells divide without control and are able to invade healthy tissues in various parts of the body.⏎
Centers for Disease Control and Prevention (CDC) - A federal agency under the U.S. Department of Health and Human Services that works with partners across the United States to ensure public health—through health promotion; prevention of disease, injury, and disability; and preparedness for new health threats.⏎