Anemia - A condition in which there is a deficit in the number of healthy red blood cells in the blood, resulting in fatigue and feelings of weakness.⏎
Adaptive Mutation - A mechanism through which certain cells can increase the rate in which genetic mutations occur, often in response to stress. This mechanism may help explain how bacteria develop resistance to certain antibiotics.⏎
Autoimmune Disease - An umbrella term for a range of conditions in which the immune system mistakenly attacks healthy tissue in the body.⏎
Biological Agent (Terrorism) - A bacterium, virus, or other biological toxin used in bioterrorism or biological warfare.⏎