This historical review discusses the contextual factors that led to differing U.S. Army immunization strategies as well as outcomes for tetanus and diphtheria during the Second World War.

This study examines the trend in annual incidence of hypertension and hypertensive disease, as well as annual percentages of recorded high blood pressure measurements, among U.S. service members between 2018 and 2023, utilizing data from the Defense Medical Surveillance System.

This report examines whether health-related quality of life—how mental, emotional, and physical capabilities affect daily functioning—is associated with service women’s readiness.

This report describes the investigation and findings of a major outbreak of adenovirus following the re-introduction of the adenovirus vaccine in 2011.

MSMR publishes a monthly update of reportable medical events for both active component members and Military Health System beneficiaries. Military Health System care providers and public health officials document reportable medical events through the Disease Reporting System internet.

This case report presents a unique instance of S. coagulans in a woman with a history of breast cancer and implant reconstruction who presented with a S. coagulans infection in a breast implant.

This guest editorial from the Thermal and Mountain Medicine Division of the U.S. Army Research Institute of Environmental Medicine provides recent evidence about individualized factors that may influence heat-related illness risk and strategies to prepare for training in heat.

This letter to the editor addresses the methodology from the article Correlation Between Mean Temperature and Incidence of Tick-borne Diseases Among Active Duty Service Members in the Contiguous U.S., 2000-2023, published in the March 2025 issue of MSMR.

MSMR publishes a monthly update of reportable medical events for both active component members and Military Health System beneficiaries. Military Health System care providers and public health officials document reportable medical events through the Disease Reporting System internet.

Since 2001, MSMR has published regular updates on the incidence of heat illness among U.S. active component service members. This update presents summaries of heat stroke and heat exhaustion case counts, incidence rates, and locations between 2020 and 2024.

This annual update provides more recent data on the incidence of exertional rhabdomyolysis, a pathologic muscle breakdown associated with strenuous physical activity.

This annual update provides more recent data on the incidence of exertional hyponatremia, a condition in which water and electrolytes lost during or after heavy exertion are replaced only by water, which can lead to death or serious morbidity if left untreated.