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Acute Disease

Acute Disease Service controls communicable disease in Oklahoma through:

  • Surveillance for infectious diseases
  • Investigation of disease outbreaks
  • Analyzing data to plan, implement and evaluate disease prevention and control measures
  • Dissemination of pertinent information
  • Education of healthcare professionals and the public
  • Bioterrorism preparedness

Public Health Investigation and Disease Detection of Oklahoma (PHIDDO)

The preferred method of disease reporting in Oklahoma is through the Public Health Investigation and Disease Detection of Oklahoma (PHIDDO) system. PHIDDO is a real-time, secure, internet-based application that provides a centralized place for reporting diseases and conditions in Oklahoma. All data is secure and accessible only to registered users. Once a user submits a report through PHIDDO, the disease report is reviewed and assigned for investigation and follow up. 


  • Secure disease reporting
  • Accurate report submission
  • Decrease in the time of report
  • Decrease in the time to begin and complete investigations and control efforts
  • Elimination of paperwork, faxing and mailing of reports to the OSDH. 

PHIDDO users include physicians, physician assistants, nurse practitioners, infection control practitioners, laboratorians and other personnel in a clinic or health care setting who would be submitting cases of reportable diseases and conditions.

Oklahoma Health Alert Network (OK-HAN)

The Oklahoma Health Alert Network (OK-HAN) system is an emergency communications system used to distribute emergent health-related information to healthcare providers and public health partners. Message distribution is via fax, phone, and/or e-mail. The OK-HAN secure website provides registered users with the ability to view and share information in a secure format, which includes a bulletin board, as well as the ability to update their own professional and personal information to ensure delivery of notifications. Individuals encouraged to register are health care providers, infection control practitioners, laboratorians, and public health personnel.


The Oklahoma State Board of Health officially establishes certain diseases as reportable by health practitioners, laboratory personnel and county health departments. The list of reportable diseases and pathogens in Oklahoma may be obtained by referring to the Reportable Diseases/Pathogens link on this webpage. All disease reports are investigated to determine the danger to a specific population group or to the general population at large. These diseases can be prevented or controlled by administering interventions such as immunization, immune globulin, vector control, or by other control methods. Information is collected on all disease reports to observe increasing and/or decreasing trends in disease occurrence, and to gather information regarding the causes of disease in Oklahoma. This enables the Oklahoma State Department of Health to evaluate and target our control, education, and prevention efforts across Oklahoma.

Outbreak Investigations

The epidemiologists of the Acute Disease Service respond statewide to conduct epidemiologic investigations of unusual disease clusters and outbreaks of infectious diseases. The purpose of outbreak investigation is to identify the agent causing the illness, determine the source and how the infectious disease was transmitted, and to implement control measures to prevent additional diseases, thereby protecting the public. The Acute Disease Service conducts these investigations in partnership with county health department personnel and local health care providers, and at times in cooperation with other OSDH Services, and State and Federal agencies.

Contact Information

Mailing Address:
Oklahoma State Department of Health
Acute Disease Service
123 Robert S. Kerr Ave, Ste. 1702
Oklahoma City, OK 73102-6406

Physical Address:
Oklahoma State Department of Health
Acute Disease Service
123 Robert S. Kerr Ave
Oklahoma City, OK

Phone: (405) 426-8710
Fax: (405) 900-7591