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Live-Live Rule Explanation

Why doe MCIR say that this patient/student is overdue/incomplete for MMR or Varicella? It looks to me like he/she should be complete.

It could be the "Live-Live Rule." Certain vaccines (MMR, Varicella, and Influenza Intranasal) are considered live-virus vaccines. Such vaccines must either be given on the same date, or separated by at least 28 days. Otherwise, the second vaccine will not produce a proper immune response, and it will be considered an invalid dose. For more information, http://www.cdc.gov/vaccines/vpd-vac/faqs-nipinfo-general.htm. Contact your Local Health Department if you have further questions.