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The Florida Department of Health works to protect, promote & improve the health of all people in Florida through integrated state, county, & community efforts.

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Routine Interstate Duplicate Review Process

HIV/AIDS

The CDC's Routine Interstate Duplicate Review (RIDR) Process

Florida sends a computer created identifier using components of the person's name, gender and date of birth to the CDC along with other demographic, clinical and behavioral information. The CDC studies the information from all of the states, detects cases that may be duplicates and sends the lists to the respective states for deduplication. States then work together to resolve potential duplicates by discussing case information. Outcomes can include no match (they are different people) or match. Matches are duplicates, and the states must decide which state should retain the case based on where the case was first diagnosed with HIV. The state that retains the case will include it in their analysis of HIV/AIDS surveillance data.

  • Florida's HIV/AIDS Surveillance and Routine Interstate Duplicate Review (RIDR)
  • Where do the deduplicated cases go?
  • FAQ

A strong reporting infrastructure within the 67 counties is the cornerstone of HIV surveillance in Florida. The state is divided into 17 areas, each led by a county health department (CHD) that works with program staff to coordinate surveillance activities for their area.

Florida's HIV/AIDS surveillance relies on electronic laboratory reporting. Currently, any person in charge of a laboratory that receives an HIV test order, or processes an HIV test, is required to report positive results to their local CHD within three business days (laboratories must also report all viral loads, p24 antigen, viral cultures, CD4 absolute count and percent of total lymphocytes). Health care providers who initiate an order resulting in a positive HIV test or who diagnose HIV in a patient, must report the diagnosis to their local CHD. Health care providers must also report all HIV-exposed newborns or infants less than 18 months born to an HIV-infected woman, by the next business day.

Program staff also locates cases by reviewing medical records and contacting local organizations, private providers and hospital infection control staff. Cases of HIV-related conditions, from the reporting of HIV infection in asymptomatic people to death certificate review for HIV/AIDS-related mortality, are identified as well.

Florida data are entered in the Enhanced HIV/AIDS Reporting System (eHARS) and sent to the CDC monthly. CDC maintains the national dataset—an unduplicated count of all HIV/AIDS cases in the U.S. RIDR is the process that ensures the national dataset is made up of unduplicated cases. All states participate in RIDR.

RIDR eliminates duplicate HIV Cases

The table below is based on the year the case was reported to DOH, not the year the patient was diagnosed.  For example, of the 5,211 cases reported in Florida in 2010, 4,369 of those cases were diagnosed in Florida in 2010 or earlier*. The HIV cases in this table reflect year of report but could have been diagnosed anytime (that year or before), not just 2010. Therefore these numbers will always be different.

2010-2014 HIV Infections Reported in Florida

The following are examples of how HIV cases can be duplicated in Florida.

  • EXAMPLE 1
  • EXAMPLE 2
  • EXAMPLE 3
An individual from Ohio was diagnosed five years ago with HIV. The person moved to Florida last year and found a doctor in their new town and went in for a check-up. The new doctor ordered routine lab tests, including CD4 and viral load, to see how the person was doing. These lab results were reported electronically to the Department of Health. Follow-up by surveillance staff shows current residence of diagnosis as Florida with a past HIV history in Ohio, per client. The case is entered into the database and counted as a Florida case because of the residence of diagnosis. The patient is later identified during a de-duplication process, and it is verified that the patient has an earlier diagnosis in Ohio. The residence at diagnosis is then changed to Ohio in Florida’s database, and the case will no longer be counted as a Florida case.
An individual lives in Alabama but visits family in Florida. While here, the individual attended a community event where free HIV testing was offered. The person used their family member’s Florida address. The individual tested positive and the results was reported to the Department of Health. This is the person’s first time testing HIV positive, therefore they are counted as a newly reported and newly diagnosed case in Florida. If the person goes back to Alabama and receive care and treatment for HIV, the case will remain a Florida case because the residence at diagnosis given by the patient to the testing site and/or provider was Florida.
An individual lives in a small town in southern Georgia. The individual travels into Florida to see an HIV specialist who provides outstanding care. The individual’s routine CD4 and viral load lab tests are reported electronically to the Department of Health. Follow-up by surveillance shows the individual resides in Georgia. The case will not be entered into the Florida database because the residence of diagnosis and current residence is in Georgia.