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UVB rays are a specific band of ultraviolet radiation from the sun, with wavelengths between 280 and 315 nanometers, that penetrate the Earth's atmosphere and primarily affect the outer layers of the skin, causing sunburn and increasing the risk of skin cancer. In modern contexts, they're a double-edged sword—essential for triggering vitamin D synthesis in the body while driving innovations in sunscreens and public health campaigns to mitigate their dangers.
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