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Brain Aging: Early IQ Holds Clues to Lifelong Cognition
The study then stresses that, early mental health and lifestyle are crucial determinants of brain health all through the life.

United States: A large scale and longitudinal study over a period of 25-years has helped in understanding the aging process of brains and the outcome on cognition. The study was done on participants’ information from the Lothian Birth Cohorts (LBC), a study that followed up the participants’ cognitive development from childhood through their eighties The study was published in Genomic Psychiatry on November 7, 2024, as reported by scitechdaily.com
Major Study Tracks Cognitive Aging
Dr. Ian Deary from Edinburgh University and Dr. Simon Cox reveal fascinating findings that contradict popular misconceptions about how the brain ages. Their research also states that in the elderly population, nearly fifty percent of the variance in intelligence test scores can be linked to childhood measures of cognitive ability, giving the philosophical debate on nature versus nurture in cognition some interesting things to ponder.
“What’s particularly fascinating is that even after seven decades, we found correlations of about 0.7 between childhood and older-age cognitive scores,” explains Professor Deary. “This means that just under half of the variance in intelligence in older age was already present at age 11.”
Key findings include:
- Thus, the brain ages in very different ways in two young people of the same age.
- Hypothetically, the DNA methylation pattern can be used to estimate the mortality risk.
- That is, higher early-life intelligence is associated with higher survival rates.
- Genetics affects intelligence in distinct ways during childhood and at an advanced age.
New Perspectives
The main advantage of the study is that the authors used the MMM, Scottish Mental Surveys formulated in 1932 and 1947, involving nearly all children born in Scotland in 1921 and 1936. These continuous baseline measures enabled the researchers to study entire distributions of cognitive aging throughout lifespan, uncovering patterns that have previously eluded science.
Variability in Brain Health and the Role of Imaging
It is with reference to the brain structures and activities that some of the most interesting discoveries have been made. Finally, through higher-quality scans, the investigators showed rather significant differences in the brain condition of one-age individuals. As such, the issue arises of what has caused these differences and whether they could be modified by altering certain lifestyles, as reported by scitechdaily.com
The research also challenges several preconceptions about cognitive aging. “We’ve learned that what we often assume are ’causes’ of cognitive decline in older age are sometimes actually ‘outcomes’ of earlier cognitive differences,” notes Dr. Cox. “This fundamentally changes how we think about brain health interventions.”
The findings point to several crucial areas for future investigation:
- How does the earliest possible mental capacity affect some of the life decisions that impact the brain’s health?
- In what ways do environmental influences support cognitive functions?
Can interventions tied to the middle part of life prolong better brain health as peo
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UN Warns: Bird Flu Could Devastate Global Economy

United States: A United Nations food agency has issued a stark warning about the rapid spread of the H5N1 bird flu virus, calling it an “unprecedented” global food safety threat that requires urgent, coordinated action.
Escalating Crisis: Millions of Birds Lost
A Food and Agriculture Organization (FAO) United Nations briefing identified worldwide poultry death masses and rising infections that cross between animal groups. Wild bird populations suffered from H5N1 disease in more than 300 species starting in 2021 and causing its spread to new distances according to The Hills.
FAO Deputy Director-General Godfrey Magwenzi emphasized the severe consequences:
“The disease is leading to serious impacts on food security, rural jobs, and rising consumer costs.”
Call for Coordinated Global Action
Beth Bechdol shared his opinion as another FAO Deputy Director-General that nations must collaborate to achieve desired outcomes.

According to an old wisdom a chain achieves its maximum strength through its least robust element. Animal health protection alongside human health protection can be achieved through international collaboration to decrease the impact of bird flu in both local and international scales.
The FAO recommends nations to enhance their bird flu surveillance capabilities while bettering their reporting systems and increasing laboratory capacities and implementing vaccination strategies together with biosecurity measures.
Bird Flu in the U.S.: Impact and Response
According to the CDC, the U.S. is currently managing 70 bird flu cases, affecting 41 dairy farms and 24 egg-producing facilities. While officials state there is no evidence of human-to-human transmission, concerns remain over its impact on the food supply.
The U.S. Department of Agriculture started a $1 billion plan which aims to battle the virus along with stabilizing egg market prices. The existing economic consequences of the virus outbreak have commenced.
#UN agency warns of ‘unprecedented’ #bird #flu threat as #H5N1 #virus jumps to #mammals …
— Microbes.info (@MicrobesInfo) March 19, 2025
| #pathogen | #infections | #AvianInfluenza | #birdflu | #avianflu | #publichealth | By @thisisbartosz.bsky.social via @politico.eu https://t.co/whr6b8ZX6I
Egg Prices Surge as Outbreak Disrupts Supply
The outbreak has created higher egg prices which forces restaurants to make customers pay more for meals with eggs. News reports indicate that the Justice Department began investigating important egg producers after discovering evidence of price manipulation related to the bird flu crisis.
New Bird Flu Strain Discovered in Mississippi
A bird flu strain of heightened virulence that the U.S. had not seen since 2017 was identified in a Mississippi commercial bird herd. Officials confirmed the new strain does not originate from the current H5N1 epidemic but experts remain watchful due to The Hills report.
What’s Next?
Global health experts advise taking rapid coordinated actions to stop the bird flu outbreak from escalating further because of growing worries regarding food safety and monetary consequences. Surveillance strengthening combined with preventive investments and market price fairness stands as the vital foundation for controlling the ongoing crisis.
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Daytime Sleepiness in Seniors Linked to Higher Dementia Risk

United States: Drowsy during the daytime?
Research findings suggest that daytime sleepiness among senior citizens signals an elevated risk of dementia development.
The journal Neurology published research showing women aged 80 experienced two times greater risk of dementia when their daytime sleepiness increased throughout five years, as reported by HealthDay.
Sleep Disruptions May Be an Early Warning Sign
“The brain requires sleep for cognitive health because this rest period allows mental rejuvenation to improve clear thinking and information retention” according to senior researcher Yue Leng who serves as associate professor of psychiatry at the University of California-San Francisco in the news release.
According to Leng sleep-related problems seem to affect cognitive aging processes and might detect or increase risks for dementia in women aged 80 years old.
Study Tracks Sleep Patterns and Cognitive Decline
The research team studied 733 women who were 83 years old on average for five years. The participants showed no signs of dementia or mild cognitive impairment when the study began.

Women utilized wrist devices during the three-day tracking phase at the study commencement point, followed by the termination point.
The devices monitored sleep pattern variations among 56% of participants across five years.
During the five-year study period, 22% of participants developed mild cognitive impairment, alongside 13% who suffered from dementia.
Sleep pattern shifts are linked to potential brain deterioration, according to results obtained in the study.
Among the study participants who maintained consistent sleep patterns, dementia developed in 8% but increased to 15% among those whose nighttime sleep deteriorated and reached 19% among participants who experienced daytime sleepiness.
Dementia Risk More Than Doubles with Daytime Sleepiness
Research outcomes showed that women experiencing increased sleepiness demonstrated a dementia risk, which was 2.2 times higher after accounting for additional risk variables.

“We observed that sleeping, napping, and circadian rhythms can change dramatically over only five years for women in their 80s,” Leng said.
“This highlights the need for future studies to look at all aspects of daily sleep patterns to better understand how changes in these patterns over time can be linked to dementia risk,” she added.
Experts Call for Sleep-Focused Interventions
The study findings suggest sleep serves as an essential brain protectant, according to Dr. Marino Muxfeldt Bianchin and his editorial partner, who are professors of internal medicine at the Federal University of Rio Grande do Sul in Brazil, as reported by HealthDay.
“Initiatives focusing on improving sleep efficiency, encouraging lifestyle changes, and implementing cognitive interventions may be essential in mitigating dementia risk in the aging population,” Bianchin wrote.
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CDC Warns of Rising Dengue Fever Cases Among U.S. Travelers

United States: The Centers for Disease Control and Prevention has issued a warning about increasing dengue fever cases among U.S. travelers who are projected to experience more cases throughout this year.
Record-High Cases Reported, Surge Expected in 2025
The number of dengue fever cases detected among U.S. travelers reached “record high” levels during the previous year when 3,484 cases were reported which marked an 84 percent surge from the previous figures, as reported by The Hills.
“This trend is expected to continue with increased dengue activity in endemic areas in 2025,” the warning from the CDC reads.
High Transmission in the U.S. Territories
Dengue transmission continues at high levels across specific United States regions together with selected global areas, while Puerto Rico, along with the U.S. Virgin Islands, attains similar transmission rates within the Americas.

Travelers can acquire dengue with greater ease when they visit sunnier regions from March through September, which heightens their risk of infection.
Recent years have brought a growing number of virus cases and these increases primarily affect the Americas based on World Health Organization (WHO) reports.
Developing nations reported 7.6 million virus cases to the WHO in 2024, showing 3.4 million confirmed cases along with over 16,000 serious cases and more than 3,000 fatalities from the disease.
Dengue fever cases in Puerto Rico have continued to surpass the outbreak threshold since Last February 2024. Public health declared an emergency status in March 2024 and continues to this day.

Dengue cases on the island totaled 6,291 for 2024 alongside more than 52 percent of patients needing hospital care and 13 fatalities documented by the CDC.
U.S. Hotspots for Travel-Related Cases
Recommendations have been issued for a dengue outbreak emergency in the U.S. Virgin Islands since August 2024 and remain current, as reported by The Hills.
A total of 208 dengue cases occurred in 2024, followed by 30 cases in 2025, according to early March records. The Centers for Disease Control and Prevention recorded that Florida, California and New York had the most travel-associated dengue cases throughout 2024.
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