1 Harvard-MIT (Massachusetts Institute of Technology) Program in Health Sciences and Technology, Harvard Medical School, Boston, Massachusetts.
2 Clinical Augmented Intelligence Group, Laboratory of Computer Science, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.
3 Department of Medicine, Harvard Medical School, Boston, Massachusetts.
4 Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts.
This cohort study uses hospitalization and 30-day mortality risks to create a temporal profile of the severity of COVID-19 in Massachusetts from July 2021 to December 2022.