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Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by the sun and artificial sources. The beneficial effects of UV radiation include the production of a vital nutrient, vitamin D. However, overexposure may present risks. Sunburn, premature aging, and skin cancer are all risks to overexposure. Keeping you and others protected from UV radiation is an important year-round.

In July 2014, the Office of the Surgeon General released The Surgeon General's Call to Action to Prevent Skin Cancer, establishing skin cancer prevention as a high priority for our nation. The "Skin Cancer Prevention Progress Report" summarizes recent prevention efforts and highlights new data, developments, and success stories following the Call to Action.

Natural sources ofUV light

Provides information about the risks of UV radiation to outdoor workers, symptoms of sunburn and first aid tips. NIOSH also provides a listing of recommendations for protection from UV radiation that employers can distribute to workers who perform duties outdoors.

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Keeping yourself and others protected from UV radiation is important year round, not just at the beach or during the summer months.

UV radiation is classified into one of three primary groups: ultraviolet A (UVA), ultraviolet B, (UVB) and ultraviolet C (UVC). This grouping is based on the measure of their wavelength, which is measured in nanometers (nm= 0.000000001 meters or 1×10-9 meters).

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Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by both natural and artificial sources. There are both benefits and risks to UV radiation. You should always protect yourself from over-exposure to reduce your risk of sunburn, premature aging, and skin cancer.

This web site provides basic information about the health effects of ultraviolet radiation and the difference between UVA, UVB, and UVC.

Sources ofUV lightat home

Provides information for travelers about overexposure to the sun, health risks from UV rays, and preventive actions that travelers can take to avoid overexposure.

Artificial sources ofUV light

The UV Index scale helps us understand how harmful UV radiation can be on a given day. This useful tool forecasts the strength of the sun's harmful rays. Remember, the higher the number, the greater chance of overexposure leading to health concerns.

The two most common types of skin cancer are basal cell cancer and squamous cell cancer. Typically, they usually form on the head, face, neck, hands, and arms because these body parts are the most exposed to UV radiation. Most cases of melanoma, the deadliest kind of skin cancer, are caused by exposure to UV radiation.

All UVC and most UVB radiation is absorbed by the earth’s ozone layer, so nearly all of the ultraviolet radiation received on Earth is UVA. Even though UVA radiation is weaker energy than UVB, it penetrates deeper into the skin and is more constant throughout the year. Because UVC radiation is absorbed by the earth’s ozone layer, it does not pose as much of a risk. UVC produced by germicidal UV lights, however, can be harmful from human exposure.

In the United States, the Food and Drug Administration (FDA) regulates tanning beds and other devices that can produce UV light. The FDA classifies these products as medical devices and are subject to performance standards.

While the World Health Organization (WHO) does not recommend the use of UV tanning devices for cosmetic purposes, it is recognized that sunbeds continue to be available to the public. This practical guide, prepared by Craig Sinclair, WHO, is intended for government health authorities, to assist them in the development of public health policy in relation to sunbeds.