The Safer-Covid tool assigns a score based on the risk level associated with a given activity. For example, a long Thanksgiving gathering with more than 25 people, indoors, with no social distancing earns a score of of 8. Those four factors are activity risk, local spread, risk of severe illness, and personal risk tolerance. By putting in their zip code, users can see data on local spread. They can also answer a questionnaire about personal health and receive feedback on their risk of severe illness from Covid-19.
Source: The Nation November 25, 2020 20:26 UTC