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Mercury, also known as quicksilver, is a naturally-occurring metal that is toxic to living organisms.

The National Institute of Environmental Health Sciences, and other agencies that make up the Department of Health and Human Services (HHS) are set up to immediately respond and protect the health of our nation during disasters and other emergencies.

The goal of this research study is to compare persons who developed myositis during active duty to military personnel without autoimmune or muscle diseases, to assess risk factors for myositis.

Researchers are interested in developing a registry protocol to obtain biologic and environmental samples anonymously from adult volunteers for use in laboratory tests and studies. The samples will be used to determine if new tests are sufficiently valid and precise to be used in research studies and for quality control purposes.

Asthma patients seem to be more prone to viral infections, and NIEHS scientists believe that the cells that line these patients' airways, cause this result by overproducing TGF-beta1, a protein that promotes viral growth. This study seeks participants with and without asthma to contribute airway cell samples.

Millions of Americans and people worldwide are overweight or obese.

Studies requiring gene expression analysis by microarray methods require the extraction of high quality RNA. Fresh, frozen tissue is the optimal sample for these studies. A detailed protocol to assist the investigator in tissue collection, RNA extraction and RNA quality assessment.

Neurological diseases and disorders are those that affect the brain, including Parkinson’s Disease and Alzheimer’s Disease.

Cardiovascular disease refers to a class of diseases that pertain to the heart of blood vessels, and is the leading cause of death in the United States.

Radon is a colorless, odorless radioactive gas. It comes from the natural decay of uranium or thorium found in nearly all soils.