The investigators are developing a test that is expected to measure the amount of radiation a patient has been exposed to after a nuclear bomb. The investigator will do this by measuring the DNA in the patients blood from cells killed by the radiation.

Many diseases and medical conditions can put DNA in the blood. The investigator needs to know how much DNA in order to better interpret our radiation detection test. Therefore, the investigator is collecting blood from several patients with different diseases or medical conditions and also healthy volunteers to measure their DNA content.

Patients that will be included in this study are pregnant women, patients who have suffered a pulmonary embolism within the past 48 hours, patients who have suffered from myocardial infarction in the past 48 hours, patients with autoimmune diseases and health patients.

The investigator will collect 8 mL (one and one half teaspoons) of blood one time only. The investigator may also collect the patient's past medical history, test results and disease treatment.

Inclusion Criteria:

1. Patients must be adults in one of the following categories:

   • Pregnant
   • Suffered a pulmonary embolism within the past 48 hours
   • Myocardial infarction in the past 48 hours
   • Diagnosed with an autoimmune disease
   • Adults age 18-80
   • Self-declared healthy adults

2. Patients must be willing to undergo a blood draw

3. Patients must provide study-specific informed consent prior to study entry

Exclusion Criteria:

1. Patients not meeting the above inclusion criteria

Seeking healthy volunteers, pregnant women, patients who recently suffered a heart attach or pulmonary embolism, and patiebts with autoimmune disease. Patients who are health individuals will also be asked to participate.