The Collaborative Outcomes study on Health and Functioning during Infection Times (COH-FIT) is a large international survey project for the entire population of countries affected by the coronavirus pandemic (COVID-19). The project involves almost 200 investigators in more than 35 countries and has been endorsed by multiple national and international professional organizations. The COH-FIT project aims to identify risk and protective factors that will inform prevention and intervention programs for the COVID-19 pandemic and should other pandemics occur in the future.