The Armed Forces Health Surveillance Division plays a critical role in force health protection. As the central epidemiologic resource for the U.S. Armed Forces, AFHSD conducts medical surveillance to protect all those who serve our nation in uniform and allies who are critical to our national security interests.

Since 2001, MSMR has published regular reports on the incidence of heat illness among U.S. active component service members. This annual update presents summaries of heat stroke and heat exhaustion case counts, incidence rates, and locations from 2019 through 2023.

This report summarizes Military Heath System (MHS) data from 2019 through 2023 on the numbers, frequency, rates, trends, demographics, geographic locations, as well as military characteristics of exertional rhabdomyolysis among U.S. active component service members.

This report summarizes heat stroke and heat exhaustion case counts, incidence rates, and locations among U.S. active component service members from 2019 through 2023.

This report provides a monthly updatea of Reportable Medical Events documented in the Disease Reporting System internet (DRSi) by health care providers and public health officials throughout the Military Health System. Reportable Medical Events are a critical tool for monitoring, controlling, and preventing the occurrence and spread of diseases of ...

This report summarizes Military Heath System data from 2008 through 2023 on the numbers, frequency, rates, trends, demographics, geographic locations, as well as military characteristics of exertional hyponatremia among U.S. active component service members.

Public health preparedness and response is a critical area of focus as Defense Public Health transitions some of the military component public health functions to the Defense Health Agency. This includes all-hazard biosurveillance and public health emergency management, or PHEM.

Reportable Medical Events are documented in the Disease Reporting System internet by health care providers and public health officials throughout the Military Health System.

This Surveillance Snapshot provides influenza vaccine effectiveness estimates against ambulatory influenza among Department of Defense TRICARE beneficiaries.

This study provides the first estimate of HIV pre-exposure prophylaxis coverage in the U.S. military, defined as the proportion of the persons taking HIV PrEP out of the estimated number of persons who had indications for it, that is also comparable to U.S. civilian estimates. The population with indications for HIV PrEP was obtained from the ...

This Surveillance Snapshot provides an overview of the 2023-2024 mid-season analysis of influenza vaccine effectiveness against medically-attended ambulatory influenza infections among U.S. military active component service members.

This Surveillance Snapshot provides the number of U.S. military active component service members prescribed HIV pre-exposure prophylaxis medication in 2023.

This Surveillance Snapshot provides an overview of the 2023-2024 mid-season analysis of influenza vaccine effectiveness against influenza hospitalizations among U.S. military active component service members.