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Issue Number 364            February 5, 2003


  1. Help IAC! Provide a link on your website to IAC's newest website:


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February 5, 2003

An important way you as a health professional can help promote sound, scientifically based immunization websites is to provide links to them on your organization's website(s). The Immunization Action Coalition (IAC) is specifically asking you to help us extend the reach of our newest website, "Vaccine Information for the Public & Health Professionals" ( Launched in October 2002 and funded solely by the Centers for Disease Control and Prevention, the new website is replete with reliable information on each vaccine-preventable disease and its vaccine, as well as scientific data on vaccine safety and the importance of vaccines.

Even though it's a dependable source of immunization information for the public, the new website is not  having the influence it should. Because it's so new, few other sites currently link to it. We need you to provide a link to our newest website on your website so it can gain exposure on search engines.

People typically start the hunt for information with a search engine. What many don't realize is that search engines use "site popularity," among other criteria, to determine the order in which they rank  search results. A site that has links to it on many other sites (i.e., a "popular site") is ranked higher in a search engine's displayed results than a site that few others link to.

For example, more than 3,000 websites link to IAC's original website,, so when the keywords "immunize" or "immunization" are entered, this website appears as a top selection with many search engines. In contrast, because IAC's newest website has relatively few other websites linking to it, when the keywords "vaccine information" are entered, the resulting list may not include the  new site, even though the keywords match the site name perfectly. With most search engines, the resulting list leans relatively heavily toward organizations critical of vaccines and U.S. vaccination policy.

For these reasons, please add a link to to your organization's website(s). This may seem like a small step, but adding links to this site as well as to other sites that  supply responsible sources of immunization information, can help web-savvy health consumers reach  an accurate conclusion about immunization--that it is a positive medical intervention of enormous benefit to the public's health and well-being.   

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IZ Express is supported in part by Grant No. 1NH23IP922654 from CDC’s National Center for Immunization and Respiratory Diseases. Its contents are solely the responsibility of and do not necessarily represent the official views of CDC.

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Editorial Information

  • Editor-in-Chief
    Kelly L. Moore, MD, MPH
  • Managing Editor
    John D. Grabenstein, RPh, PhD
  • Associate Editor
    Sharon G. Humiston, MD, MPH
  • Writer/Publication Coordinator
    Taryn Chapman, MS
    Courtnay Londo, MA
  • Style and Copy Editor
    Marian Deegan, JD
  • Web Edition Managers
    Arkady Shakhnovich
    Jermaine Royes
  • Contributing Writer
    Laurel H. Wood, MPA
  • Technical Reviewer
    Kayla Ohlde

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