Ultraviolet B (UVB) radiation, which is stronger than ultraviolet A (UVA), was thought to be strongly associated with melanoma, the deadly skin cancer. A recent study, however, indicates that UVB may only be partially responsible for melanoma, but exposure to UVB significantly increases the risk of nonmalignant skin cancers. In addition, the weaker UVA radiation can also give rise to melanoma.
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