UV index 1 is the lowest reading on the UV index scale. When the UV index is 1 there is a low risk of harm from unprotected Sun exposure. According to the UV index scale, it’s safe to be outdoors when the UV index is 1. If you have light skin and/or burn easily, use a broad-spectrum sunscreen that’s SPF-15 or higher (reapply every two hours), wear sun protective clothing, a hat, and sunglasses if you’re going to be in the Sun.
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