All articles tagged with #prevalence
A meta-analysis found summer seasonal affective disorder affects about 0.57% of people—much less common than winter SAD (about 5%). The condition is thought to be triggered by heat, humidity, and pollen, and experts advise recognizing feelings and seeking help; treatments for summer depression include therapy and antidepressants, with cooling strategies offering temporary relief.
A Massachusetts General Hospital–led analysis of 457,950 COVID-19 patients across four regions found 74,560 long-COVID cases (16.3%), equating to roughly 15 million Americans. About 89.3% of those patients developed at least one chronic condition, and prevalence rose through mid-2024, indicating current code-based surveillance likely undercounts the burden. The study also noted regional differences in symptom patterns (e.g., thyroid issues in New England vs metabolic abnormalities elsewhere) and called for better surveillance, tailored treatments, and coordinated care to address the diverse manifestations of PASC.
Health Minister Mikhail Murashko urged annual HIV testing for about one-third of Russia’s population to curb rising infections, saying broader screening is essential to reduce transmission. Russia logged roughly 54 million HIV tests in 2024 (about 37% of the population), the highest in years, but WHO data show a high prevalence of about 890 per 100,000 with total living with HIV around 1.25 million in 2025. Officials also note a treatment gap, with about 900,000 officially under medical supervision in 2025. The government frames early detection through expanded testing as the key to preventing further spread.
A Yale-led study using NHIS data estimates that by 2024 about 8.3% of U.S. adults (roughly 21 million) had ever had long covid, with around 60% reporting recovery. The risk of developing long covid declined over the pandemic (from ~19.7% to 13.7%), while recovery rates rose (from ~51.2% to 59.7%), though self-reported data and the lack of a proven treatment introduce limitations. Findings align with NIH RECOVER and indicate millions remain affected and in need of understanding and care.
A Norwegian study involving over 11,000 individuals found that nearly 10% of those over 70 have Alzheimer's disease dementia, with surprising higher rates in those over 85 and variations in preclinical AD prevalence, highlighting the potential and limitations of blood-based diagnostic tools.
A large Norwegian population study found that the prevalence of Alzheimer’s disease neuropathological changes increases with age, reaching 65.2% in those over 90, with 10% of those over 70 having preclinical AD, highlighting the importance of blood-based biomarkers for large-scale assessment and potential treatment eligibility.
Long COVID is a complex, widespread condition affecting over 200 symptoms and impacting nearly one in five adults in the US who have had COVID-19, with no current approved treatments and prevention only through avoiding infection. It can affect anyone who has contracted COVID-19, regardless of severity, and is a major cause of chronic illness and disability, with prevalence likely increasing. Greater awareness and research are needed to better understand and manage this condition.
Chlamydia is the most common bacterial STI worldwide and in the US, often asymptomatic but easily treatable with antibiotics. Regular testing, condom use, and partner notification are key to prevention and control.
Nearly 44% of adults with diabetes are unaware of their condition, and among diagnosed individuals, only 42% achieve healthy blood sugar levels, highlighting a significant gap in diagnosis and management that could lead to a growing silent epidemic by 2050.
Long COVID affects about 36% of people globally, with higher risks for unvaccinated individuals, females, and pre-Omicron infections. In teens, 41% of those who tested positive reported symptoms lasting over four weeks, but most symptoms resolved within three months, indicating a lower prevalence and shorter duration in adolescents.
A CDC report reveals that from August 2021 to August 2023, 4.5% of U.S. adults had undiagnosed diabetes, while over 11% had been diagnosed. The study highlights demographic variations, showing higher undiagnosed rates among older adults and those with obesity. The CDC emphasizes the importance of diagnosis to prevent serious health complications and suggests lifestyle changes to prevent prediabetes and Type 2 diabetes.
A meta-analysis examining the link between ADHD and cannabis use disorder found that around 27% of individuals with ADHD develop cannabis use disorder at some point in their lives, with 19% currently affected. Individuals with ADHD face nearly three times the risk of developing cannabis use disorder compared to those without the disorder. The study highlights the need for further investigation into the relationship between ADHD and cannabis use disorder, while also acknowledging the limitations of the research, particularly its focus on North American studies.
A CDC-led report found that 14.5 percent of American boys and 11.3 percent of boys and girls aged five to 17 have been diagnosed with ADHD, a significant increase from previous years. The prevalence of ADHD in the US is much higher than in other countries, leading to concerns about overdiagnosis and unnecessary medication. Experts suggest that factors such as marketing campaigns, age differences in school entry, and financial incentives may contribute to the high rates of diagnosis.
A study of over 4,600 participants in Michigan found that fully vaccinated adults had a 43% to 58% lower prevalence of long COVID symptoms at 30 and 90 days post-infection compared to unvaccinated individuals. The study, published in the Annals of Epidemiology, suggests that COVID-19 vaccination may be crucial in reducing the burden of long COVID and could inform public health messaging about the benefits of vaccination.
A recent CDC study reveals that Long-COVID rates vary widely across the United States, with the U.S. Virgin Islands reporting the lowest prevalence at 1.9% of the population, while West Virginia had the highest at 10.6%. The study emphasizes the need for local policies and healthcare planning to address the increased needs of those experiencing Long-COVID, although it did not capture vaccination status or treatment details, which could influence the reported prevalence.