National COVID Cohort Collaborative (N3C)), is an NIH-led open science community that aims to acquire, harmonize, and make available patient-level COVID-19 data from participating sites to enable innovative machine learning and statistical analysis. Using data from N3C, WCM researchers can collaborate with researchers from other institutions to analyze retrospective data, conduct characterization studies, build predictive models, and carry out population level estimation. Access to the data is provisioned by the N3C team and is provided through a secure web enclave. For more information about N3C, please click here.