This research aims to collect samples like blood, urine, and cerebrospinal fluid (CSF - the liquid around the brain and spine) from people who are very sick or injured. These samples will help create new tests or tools for doctors to choose the best treatments for soldiers and civilians. The study involves patients from certain hospitals, and healthy volunteers too. The healthy volunteers should not have serious illnesses or injuries. Participants must understand the study and agree to join it.

• The study takes place at specific hospitals: Grady Memorial, Emory University, and Duke University.
• Participants will need to give samples like blood and other fluids or tissues.
• Your doctor will determine if participating is safe based on your medical condition.