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uvb rays
  Skin Cancer The number of new cases of cancer I
.... to sunlight, especially when it results in sunburn and blistering." The sun is commonly known to omit two kinds of ultraviolet rays: UVA rays and UVB rays. ....
(2347 9 )

Marketing a European Suntan Product
.... Physicians agree that an SPF of 15 blocks approximately 93 percent of the sun's rays, but only the UVB rays, not the UVA rays (which can be more dangerous than ....
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