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Influenza or "flu" is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Syptoms often start with a sudden onset of fever, and may include cough, sore throat, runny or stuffy nose, headache, body aches and nausea.  While people 65 years and older, young children, and people with certain health conditions are at higher risk of serious flu complications than the active-duty population, severe cases can occur unpredictably among active duty personnel as well. Also, because it can spread quickly, influenza outbreaks can adversely impact Navy force readiness and mission execution.

Resources on this page provide policy, guidance, and best practices for the prevention of influenza for military members and beneficiaries.

Seasonal vaccination is the primary control measure to reduce the risk of severe influenza and mission degradation, minimizing the risk to force. Department of Defense (DoD) policy mandates that all Active Duty and Reserve Component personnel be immunized against influenza annually.

Policy and Guidance

Web Resources
Publications and Products  
Winter Respiratory Dashboard
Provides a weekly review of data and trend trajectories for respiratory diseases/illness to include Influenza, Influenza like Illnesses (ILIs), Upper Respiratory Infections (URIs), Pneumonia, Positive COVID tests and other COVID Like Illnesses (CLIs).

**Please contact your respective Navy Environmental and Preventive Medicine Unit (NEPMU) at for consultative support.**
Training Resources
  • Seasonal Influenza Vaccination Training
    • JKO Course Number DHA-US069: This course was designed to help provide military and civilian health care personnel with important and comprehensive information concerning the influenza vaccine. It is designed to prepare health care personnel to administer influenza vaccinations and perform required administrative tasks in support of the DOD and USCG's Influenza Vaccination Program. This curriculum includes five training modules and a quiz. It is designed to meet seasonal influenza vaccination training requirement for medical personnel administering influenza vaccinations.
Note: If you previously took influenza vaccination training through the CDC’s You Call The Shots Goes to CDC website, that meets this requirement and there is no need to retake training in JKO. Those who previously enrolled in the JKO training but did not complete it will be automatically re-enrolled in the current module released on 21 Sept 2023.
  • Seasonal Influenza Vaccine Cold Chain Management for Logistical Personnel
    • JKO Course Number DHA-US070; JKO flu storage and handling training: This course was designed to help provide non-clinical personnel (i.e., pharmacy, logistics, and support staff) with important and comprehensive information concerning storage and handling of the influenza vaccine. It is designed to prepare healthcare personnel with handling of the influenza vaccinations and perform required administrative tasks in support of the DOD's Influenza Vaccination Program. This course is current for the 2023-24 influenza season.
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