The U.S. Millennium Cohort Study is a population-based prospective study that includes over 200,000 current and prior U.S. military service members.

Diarrheal illnesses have an enormous impact on military operations in the deployed and training environments. While bacteria and viruses are the usual causes of gastrointestinal disease outbreaks, 2 Joint Base San Antonio–Lackland, TX, training populations experienced an outbreak of diarrheal illness caused by the parasite Cyclospora cayetanensis in ...

The natural human sex ratio at birth (male:female) slightly favors males, and altered sex ratios might be indicative of exposure to reproductive hazards.

As in prior years, mental health disorders, pregnancy-related conditions, and injury/poisoning accounted for the majority (59.8%) of all hospitalizations among active component service members in 2018. However, the hospitalization rate for all causes was the lowest rate in the past 10 years.

As in prior years, mental health disorders, pregnancy-related conditions, and injury/poisoning accounted for the majority (59.8%) of all hospitalizations among active component service members in 2018. However, the hospitalization rate for all causes was the lowest rate in the past 10 years.

In 2018, mental health disorders accounted for the largest proportions of the morbidity and healthcare burdens that affected the pediatric and younger adult beneficiary age groups. Among adults aged 45–64 years, musculoskeletal diseases accounted for the most morbidity and healthcare burdens, and among adults aged 65 years or older, cardiovascular ...

The number of medical evacuations for battle injuries has decreased considerably since 2014. Most medical evacuations in 2018 were attributed to mental health disorders, followed by non-battle injury/poisoning; signs, symptoms, and ill-defined conditions; musculoskeletal disorders; and digestive system disorders.

Among service members deployed during 2018, injury/poisoning, musculoskeletal diseases, and signs/symptoms accounted for more than half of the total health care burden while deployed. Compared to the distribution of major burden of disease categories documented in garrison, a relatively greater proportion of in-theater medical encounters due to ...

Musculoskeletal disorders and mental health disorders accounted for more than half (52.6%) of all illness- and injury-related ambulatory encounters among active component service members in 2018. Since 2014, the number of ambulatory visits for mental health disorders has decreased, while the numbers of ambulatory visits for musculoskeletal system ...

Surveillance Snapshot: Illness and Injury Burdens, Reserve Component, U.S. Armed Forces, 2018

As in prior years, mental health disorders, pregnancy-related conditions, and injury/poisoning accounted for the majority (59.8%) of all hospitalizations among active component service members in 2018. However, the hospitalization rate for all causes was the lowest rate in the past 10 years.

In 2018, mental health disorders accounted for the largest proportions of the morbidity and healthcare burdens that affected the pediatric and younger adult beneficiary age groups. Among adults aged 45–64 years, musculoskeletal diseases accounted for the most morbidity and health care burdens, and among adults aged 65 years or older, cardiovascular ...

Surveillance Snapshot: Illness and Injury Burdens, Recruit Trainees, Active Component, U.S. Armed Forces, 2018

As the most frequently reported vector-borne disease among active component U.S. service members, with an incidence rate of 16 cases per 100,000 person-years in 2011, Lyme disease poses both a challenge to health care providers in the Military Health System and a threat to military readiness. Spread through the bite of an infected blacklegged tick, ...

In 2018, there were 578 incident diagnoses of heat stroke and 2,214 incident diagnoses of heat exhaustion among active component service members. The overall crude incidence rates of heat stroke and heat exhaustion diagnoses were 0.45 cases and 1.71 cases per 1,000 person-years, respectively. In 2018, subgroup-specific rates of incident heat stroke ...