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How common is long COVID? Why studies give different answers

Enormous databases do not necessarily allow scientists to solve long COVID mysteries, such as how well vaccination protects against the condition.
  1. Heidi Ledford
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Clinical epidemiologist Ziyad Al-Aly has access to a treasure trove that many researchers can only dream of: millions of sets of electronic medical records from the US Department of Veterans Affairs (VA), which provides health care for the country’s military veterans.

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Nature 606, 852-853 (2022)

doi: https://doi.org/10.1038/d41586-022-01702-2

References

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