The ultraviolet index (UVI) is a measure of the level of UV radiation. UVI 3 is the level above which sun protection is recommended by the World Health Organization (WHO).

Cancer Society prevention policy lead Emma Shields said it was alarming to see teenagers on TikTok promoting the UV Index (UVI) as a tanning guide. The UVI shown on weather and forecasting apps is ...

The UV Index (or UVI) is a standard international measure of ultraviolet radiation emitted by the sun which penetrates the Earth's atmosphere and can cause sunburn. Index values start at zero and ...