Experiencing daytime sleepiness is something that is usually perceived as a minor inconvenience, but for older adults, it could be an early warning sign of Dementia. This neurodegenerative disease leads to the progressive decline of brain cells. This eventually

affects memory, cognition, and personality, making everyday tasks more difficult. As one of the fastest-growing neurological disorders across the world, dementia poses a significant health threat to ageing populations.

Is Dementia Linked To Poor Sleep?

For this study, researchers followed 445 older adults (average age 76) over three years, aiming to determine whether poor sleep could increase the risk of mild cognitive impairment (MCI), which often leads to dementia. At the start, none of the participants had MCI, but by the end of the study, 36 individuals had developed the condition.

The researchers discovered that participants with poor sleep were more likely to develop MCI compared to those who slept well. However, when depression symptoms were taken into account, the link between poor sleep and MCI became less pronounced, suggesting that while sleep issues are a concern, mental health also plays a key role in dementia risk.

To assess sleep quality, the Pittsburgh Sleep Quality Index (PSQI) was used, evaluating factors such as sleep duration, disturbances, and daytime alertness. Among these, "daytime dysfunction"—defined as excessive sleepiness and low energy during the day—was most strongly associated with an increased risk of MCI. Those experiencing daytime dysfunction were more than three times as likely to develop MCI as those who didn’t report such symptoms.

There are many types of dementia:

Dementia is not a specific disease. According to the Centers for Disease Control and Prevention (CDC), it is an overall term that describes a decline in mental ability that interferes with daily life. People with dementia often have symptoms like trouble remembering, thinking, or making everyday decisions. These symptoms tend to get worse over time.

Alzheimer’s disease is the most common type of dementia, and it mostly affects the elderly. Each form of dementia has a different cause. Though dementia mostly affects older adults, it is not a part of normal ageing. An estimated 6.7 million older adults have Alzheimer's disease in the United States. That number is expected to double by 2060, as per data from the CDC.

In 2022, 3.8% of men and 4.2% women in US were diagnosed with dementia. The percentage of people increase with age from 1.7% for those aged 65-74 to 13.1% for those aged 85 and older. Alzheimer's accounts for 60 to 80% of all dementia cases and it is most prevalent in California, Florida, and Texas, as these states have the highest number of people.

One month has passed since the Democratic Republic of the Congo (DRC) declared its 17th Ebola outbreak, and there is no sign of respite. Confirmed cases and deaths have surged to 808 and 192, respectively, according to the country's Health Ministry.

Uganda has confirmed 19 infections, while Congo's Ituri province, where the outbreak first emerged, accounts for more than 90% of cases in the country.

The outbreak was reported to the World Health Organization (WHO) and the outbreak was officially declared on May 15.

The cases continue to surge daily as health authorities and aid agencies grapple with inadequate testing, weak contact tracing, and community resistance.

However, experts warn the outbreak's true scale may be far greater than official data indicate, making it already the third-deadliest Ebola outbreak on record.

Ebola Epidemic Moving Upward

Also read: Ebola Survivors May Face COVID-Like Memory Loss and Brain Issues For Over 7 Years: NIH Study

According to Dieudonne Mwamba Kazadi, head of the DRC National Institute of Public Health (INSP), the Ebola epidemic was still moving upward in Bunia, the capital of Ituri province and the epicenter of the outbreak, Xinhua News Agency reported.

"We are still in the midst of the epidemic. I would say we are in the upward phase of the outbreak, the active phase," Kazadi said.

More confirmed cases are expected in the coming days, making it urgent to expand treatment capacity and establish new Ebola treatment centers in affected areas, he noted.

"The perspective is really to increase capacity and already have treatment centers positioned to receive the future suspected and confirmed cases that we will identify in the coming days and weeks," Kazadi said, stressing the need to "engaging communities further," he said.

True Scale of Outbreak Remains Unclear

Read More: Expert Explains Science Behind Ebola Patient Recoveries

Medical charity Medecins Sans Frontieres (MSF) said in a statement that the government's figures likely understate the true toll of the outbreak, echoing concerns raised by aid groups and some Congolese officials.

"No one knows the true scale or exactly where the disease is spreading in DRC," said Kate White, MSF's emergency medical coordinator.

"One month on, the Ebola disease outbreak is outpacing the response effort," White said.

She noted that most treatment centers in Ituri province are overwhelmed, with many patients arriving at a late stage of the disease.

"What we do know is that most treatment centers in Ituri province are overwhelmed; many of our patients arrive at a late stage of the disease, and the majority were never identified or monitored as contacts before seeking care," White said.

Testing and Contact Tracing Challenges

Testing remains "one of the most significant weaknesses in the response," according to the MSF statement.

WHO Director-General Tedros Adhanom Ghebreyesus said he was “really worried” about the outbreak after visiting the DRC, Stat News reported.

“When the community is not taking it as its priority, it’s very hard,’’ Tedros said. He said that in the North Kivu, South Kivu, and Ituri provinces where the outbreak is centered, Ebola is seen as a lesser evil compared with armed conflict, widespread hunger, and more common deadly diseases experienced daily.

Notably, many communities, particularly those affected by active armed conflict, still lack access to test kits. Treatment centers are also facing significant delays in receiving laboratory results, hampering efforts to quickly identify and isolate infections.

What Is Ebola?

Ebola is a highly lethal viral hemorrhagic fever first identified in 1976. Over the past five decades, it has caused over 30 outbreaks, primarily in Central and West Africa.

Symptoms include fever, headache, weakness, vomiting, diarrhea, muscle pain, sore throat, and unexplained bleeding. This eventually leads to severe complications like bleeding, organ failure, and death.

Aid groups warn that without stronger surveillance, faster testing, and improved contact tracing, the outbreak could continue to expand in the weeks ahead.

The United Kingdom is planning to create a new normal for children by banning social media for kids under 16. The services of social media, including Instagram and Snapchat, will not be available for adolescents in the island nation. The government there is planning to follow in the steps of Australia and block social media to ensure a safe and secure childhood.

To better protect children online and tackle growing digital risks, the government plans to introduce measures that go beyond a simple social media ban. Under the proposal, children under 16 would be blocked from accessing high-risk features such as livestreaming and communicating with strangers online. These world-leading restrictions would extend beyond social media platforms to cover a broader range of online services, including gaming websites, making the policy one of the most comprehensive child online safety measures introduced anywhere in the world.

Prime Minister Keir Starmer said, Parents want to keep their kids safe and happy, but the online world has made that harder than ever." He added, "I’ve heard firsthand from families crying out for change, and we will do right by them."

He also said that any country can ban social media for under-16s and put wider protections in place to give kids their childhood back.

Other Countries That Are Planning To Implement Social Media Ban

• Denmark: Plans to ban social media for children under 15, with limited parental exceptions for those aged 13–14.
• France: Approved a bill to ban social media for children under 15, pending final legislative approval.
• India: Karnataka has banned social media for children under 16. Other states like Andhra Pradesh, Goa, and Bihar are considering age restrictions.
• Italy: Children under 14 need parental consent to create social media accounts.
• Poland: Drafted legislation to ban social media for children under 15 and require age verification.
• Slovenia: Preparing a law that would prohibit social media access for children under 15.
• Spain: Plans to ban social media access for minors under 16 and require age verification.
• Sweden: A government commission has recommended a minimum social media age of 15.
• United States: Several states require parental consent for minors, while federal legislation seeks stronger protections for young users.
• European Union: Considering stricter child safety rules, including parental consent for under-16s and a ban for children under 13.

Which Countries Have Already Banned Or Imposed Curbs On Social Media Use By Children?

There are several nations that have already banned or implemented significant mechanisms to curb social media use by children. Australia, Malaysia, and Turkey have already passed laws to ban social media for children. On the other hand, China and Greece have made arrangements to curb the use of social media by children.

The dengue virus is rapidly shifting serotypes, especially in young adults. The phenomenon is not unique to India and has been observed in several dengue-endemic countries across Asia, Latin America, and parts of the Pacific.

Dengue is caused by four closely related virus serotypes: DENV-1, DENV-2, DENV-3, and DENV-4. The dominant serotype in circulation can change over time, leading to new outbreaks when population immunity is low against the emerging strain.

A 2026 genomic study, published in the international journal Acta Tropica, found that DENV-2 and DENV-3 were the most common serotypes between 2019 and 2024 in South India, with dominance shifting every 2–3 years. The authors, including those from the Indian Institute of Science, Bengaluru, highlighted the importance of monitoring these shifts because they can alter outbreak severity and vaccine effectiveness.

A 2025 study led by researchers from AIIMS Bhopal reported the emergence of a new DENV-2 lineage that displaced the previously dominant DENV-1 strain between 2019 and 2023. The findings, published in the journal Viruses, demonstrated how one serotype can replace another in a population.

“India is witnessing active serotype shifts, and they directly explain rising severity, especially in young adults. Initial infection with one of the four dengue serotypes results in lifelong immunity to that specific serotype. Whereas, a secondary infection with a different serotype can trigger Antibody-Dependent Enhancement (ADE),” Dr. Shikha Taneja Malik, Senior Scientific Affairs Manager, Drugs for Neglected Diseases initiative (DNDi), South Asia, told HealthandMe.

“Young adults who were exposed to one serotype in childhood are now encountering a new dominant serotype, making them especially vulnerable to severe secondary infections,” she added.

The four serotypes of dengue virus makes it a difficult virus; and protection against one does not always mean balanced protection against all.

"In young adults, this becomes even more important because many may have already been exposed to one dengue serotype earlier in life, while later infections may involve a different or shifting virus serotype. This can make the immune response more complex and, in some cases, may increase the risk of severe disease through antibody-dependent enhancement," Dr. Rohit Sharma, Consultant, Apollo Spectra Hospital, Jaipur, told HealthandMe.

Shifting Serotypes: A Global Trend Beyond India

Researchers have also documented a gradual shift in disease burden from children toward adolescents and young adults in some regions. This occurs because:

• Previous exposure patterns change over time.
• Urbanization increases transmission among older age groups.
• Childhood immunity profiles evolve as dominant serotypes change.
• Secondary infections with a different serotype can increase the risk of severe disease.

India's Indigenous Dengue Vaccine: DengiAll

DengiAll is India's first indigenous tetravalent dengue vaccine. Developed by the Indian pharmaceutical company Panacea Biotec, it is designed to protect against all four serotypes of the dengue virus and requires only a single dose.

The indigenously developed dengue vaccine is expected to play a crucial role in protecting the 10–20 age group, who are most susceptible to severe dengue cases, Dr. N. K. Arora, Member of the National Technical Advisory Group on Immunisation in India (NTAGI), told HealthandMe.

"Most dengue infections are mild, and treatment protocols have improved significantly over the years. However, the disease can become severe, particularly among adolescents and young adults aged 10–20 years. This is why the indigenous dengue vaccine is being eagerly awaited, as it has the potential to provide an important layer of protection for this vulnerable age group," he said.

The vaccine expert noted that the indigenous dengue vaccine is currently undergoing trials.

“The trials will take at least two and a half years, which means by the end of 2028, we will have the results,” Dr. Arora said.

Brazil's Vaccine Setback Raises Questions for India

Also read: Dengue Is Spreading Beyond Monsoons And Into New Regions Across India, Says Expert

Meanwhile, Brazil has suspended its Butantan-DV dengue vaccine after the death of two people who received the shot, which was proven to be over 80 percent effective in preventing the risk of severe disease for up to five years

This suspension, announced on June 8, is a crucial wake-up call for India, said experts, as the Butantan-DV is pretty similar, if not identical, to DengiAll. Both are also based on the same core viral strains developed by the US National Institutes of Health (NIH),

"Brazil’s recent experience with its dengue vaccination campaign should be viewed as an important safety signal for India, especially as India prepares for the possible rollout of DengiAll," Dr. Rohit said.

"Before any large-scale rollout, India must carefully study whether the vaccine produces strong type-specific protection against all four serotypes and whether there is any risk of imbalance in immunity," he added.

A dengue vaccine can be a major public health tool, but it must be supported by transparent data, long-term safety monitoring, and region-wise surveillance of circulating dengue serotypes, the experts said.