May 26, 2022


During the early months of the COVID-19 pandemic, many patients with COVID-19 were admitted to hospital having deteriorated several days after they were first diagnosed. Many of these patients had “silent hypoxia” (low blood oxygen saturation levels without typical symptoms or awareness) and, once at hospital, often required intensive treatment with a high risk of mortality.

  • Alaa A.
  • Qian Z.
  • Rashbass J.
  • Benger J.
  • van der Schaar M.
Retrospective cohort study of admission timing and mortality following COVID-19 infection in England.