To rule out confounding, observational studies of influenza vaccine need to include analyses during the "preinfluenza period"

Arch Intern Med. 2007 Jul 23;167(14):1553-4; author reply 1554-5. doi: 10.1001/archinte.167.14.1553-b.
No abstract available

Publication types

  • Letter
  • Comment

MeSH terms

  • Adult
  • Aged
  • Confounding Factors, Epidemiologic
  • Humans
  • Influenza Vaccines*
  • Influenza, Human / etiology
  • Influenza, Human / prevention & control*

Substances

  • Influenza Vaccines