- Increased risk for COVID‐19 breakthrough infection in fully vaccinated patients with substance use disorders (SUD) in the United States between December 2020 and August 2021, N=579,372 (30,183 with a diagnosis of SUD and 549,189 without such a diagnosis). https://onlinelibrary.wiley.com/doi/full/10.1002/wps.20921 8 comments science