Article Text

Download PDFPDF
Lessons from the past

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.


  • Disclaimer The views and opinions of authors expressed herein do not necessarily reflect the official positions of the Centers for Disease Control and Prevention or those of the United States government, and shall not be used for advertising or product endorsement purposes.

  • Competing interests None.

  • Provenance and peer review Not commissioned; internally peer reviewed.