The formula below was developed in ☌, but has been modified in the web calculator to use ☏. The predictive power is limited to temperature between 74-95☏ and relative humidity between 20-60% for a UV index of 0, and a temperature of 68☏ and 20% relative humidity for a UV index between 1.5 and 12. Relative humidity, temperature, and sunlight (UV) can be used to provide an estimated half-life for SARS-CoV-2 with this model with some degree of certainty. * Note: Temperature (68☏) and relative humidity (20%) input cannot be changed for UV values greater than 0.
