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.

Days after the death of Darya Shipilova, a 28-year-old laboratory technician in Irkutsk's Anti-Plague Research Institute, sparked global headlines about a possible pneumonic plague outbreak, reports of a suspected second case instilled concern in global health bodies and citizens.

Russia responded to the reports of the second plague case in Siberia, while the World Health Organization (WHO) says it still lacks enough information to determine what caused the death of the laboratory worker.

Initial reports suggested she could have contracted pneumonic plague following a possible laboratory exposure, although Russian authorities have not confirmed that diagnosis.

Russia Denies Second Plague Case

Also read: Second Plague Death Reported As Russia Denies Outbreak

Local media reported the second death after Baikalsk authorities issued a Telegram warning on October 3 about “unofficial information” of a confirmed plague case in Shelekhov, The Daily Mail reported.

“Due to unofficial information about a confirmed case of plague in a person in the city of Shelekhov, we ask you to limit visits to Shelekhov and nearby settlements until the circumstances surrounding this threat are clarified,” the administration said.

The post was deleted about two hours later, according to local media Lyudi Baikala. There is no official confirmation that the person had plague or died from Yersinia pestis.

Russia's public health watchdog, Rospotrebnadzor, however, has maintained that Shipilova died from pneumonia of unknown or undetermined origin, rather than plague.

The agency said nearly 5,000 laboratory tests conducted among people connected to the incident had found no dangerous pathogens. More than 90% of the people who were placed under medical observation had completed monitoring.

Rospotrebnadzor also said Shipilova had been vaccinated and had immunity against the dangerous infections she worked with. It said there was no epidemic risk in the region.

The Kremlin has also rejected reports of a second suspected case. Kremlin spokesman Dmitry Peskov said the majority of media reports surrounding the incident were false and urged people to rely on official statements from Rospotrebnadzor.

According to Reuters, “There is a great deal of media coverage, and the vast majority of what the media are reporting about this situation is false information,” Peskov said.

WHO Investigates Lab Worker's Death

Also read: Russia Tells WHO No Plague Cases In Irkutsk, But Lab Worker's Death Remains Unexplained

Despite Russia's reassurances, the WHO says important questions about the lab worker's death still remain unanswered. WHO Director-General Tedros Adhanom Ghebreyesus said the organisation has requested details of the laboratory testing carried out on Shipilova and her contacts, the reasons behind the public-health measures and the current health status of those monitored.

The WHO has also asked Russia to verify reports that a second employee developed pneumonia of undetermined cause.

“As we don’t yet have the full picture of this event, we are not able to conduct a full risk assessment,” Tedros said. He stressed that timely, complete and transparent information is necessary to establish what happened and assess any potential public-health risk.

Maria Van Kerkhove, WHO director of epidemic and pandemic management, said the agency does not yet know the causative agent behind Shipilova's death.

“Right now, we don't know the causative agent of how this woman died. And that's really what we want to better understand,” she said.

Bioweapon Claims

There's also uncertainty which has prompted questions in the US about whether the incident could involve a biological weapon.

US President Donald Trump was asked on October 7 whether he believed the Russian lab worker's death was linked to a bioweapon, US President Donald Trump said: “We don't think so. We're going to find out soon enough, but we don't think so.”

He also said his administration was in “very deep discussions” about the incident and that he had a call with Russian President Vladimir Putin scheduled.

US officials, meanwhile, have continued monitoring the situation. CDC Director Erica Schwartz said the agency was prepared to monitor and screen travellers.

Secretary of State Marco Rubio said Washington was monitoring reports of possible plague but said they were not a “cause for alarm”. “There’s very limited travel between the US and Russia, obviously, but like anything else, something like that gets out, it could quickly spread,” Rubio said.

“So we're watching and monitoring it closely. I don't think it's cause for alarm – but it is cause for focus and a cause to just keep an eye on it. And we're doing that.”

Meanwhile, neighboring countries including Mongolia, Kyrgyzstan and Uzbekistan have reportedly tightened border health measures.

Novartis’ drug remibrutinib can now also be used for adults with symptomatic dermographism, according to the US Food and Drug Administration (FDA).

Marketed as Rhapsido, it is the first FDA-approved treatment specifically for symptomatic dermographism in adults whose symptoms do not sufficiently respond to H1 antihistamines.

Symptomatic dermographism is a condition is a form of chronic hives in which even minor scratching, rubbing or friction can trigger itchy, raised welts on the skin.

This has led Rhapsido to become the only prescription treatment in the US with approved uses for both symptomatic dermographism and chronic spontaneous urticaria when antihistamines alone are insufficient.

FDA Approves Remibrutinib For Symptomatic ermographism

The move came after symptomatic dermographism cohort of the Phase III RemIND trial, which included adults who remained symptomatic despite treatment with second-generation H1 antihistamines.

After 12 weeks, 29.3% of patients taking remibrutinib treated hives completely, compared to 14% of those receiving placebo. Novartis said improvements were seen as early as two weeks.

“SD is a chronic, debilitating condition with historically limited treatment options,” said Giselle Mosnaim, MD, MS, lead RemIND trial investigator. “Remibrutinib offers, for the first time, an approach to treatment specifically for SD patients who remain inadequately controlled with H1 antihistamines alone, representing a meaningful step forward for this population.”

Also read: HPV Vaccine May Keep Cervical Cancer Risk Lower In Women With HIV For Years: Lancet

What Is Symptomatic Dermographism?

Dermographism, sometimes called 'skin writing', occurs when the skin develops raised marks or welts after being scratched or pressurised.

In symptomatic dermographism, the reaction is accompanied by significant itching and hives. A person may develop welts after scratching an itch, rubbing against clothing, carrying a bag, drying off with a towel after a shower or any other everyday friction.

The welts can appear within minutes of the physical trigger, making ordinary contact with the skin unexpectedly uncomfortable.

Symptomatic dermographism is classified as a form of chronic inducible urticaria, meaning the hives are triggered by a specific physical stimulus rather than appearing spontaneously.

Also read: New Lymphoma Trial: Experimental Drug Combination Cuts Progression Or Death Risk By 51%

Why Scratching Cause Hives In Symptomatic Dermographism?

The reaction of hives forming after scratching involves mast cells, immune cells found in the skin that can release histamine and other inflammatory substances. When the skin is physically stimulated, these cells activate, triggering the characteristic redness, swelling, and itching.

This is also where remibrutinib works differently from conventional antihistamine. Remibrutinib is an oral, highly selective Bruton’s tyrosine kinase (BTK) inhibitor.

By blocking the BTK process that is involved in immune-cell signalling and histamine release, the drug aims to reduce the chain of events that produce hives and itching.

Living With Symptomatic Dermographism

For most people, the condition is primarily a chronic quality-of-life problem rather than a life-threatening disease. However, persistent itching and unpredictable hives can interfere with sleep, clothing choices, work, and everyday activities.

The FDA approval does not mean remibrutinib is intended for everyone with dermographism. It is approved for adults whose symptomatic dermographism cannot be controlled by existing H1 antihistamines.

The most common adverse events reported with remibrutinib in trials included nasopharyngitis, bleeding, headache, nausea and abdominal pain.

Around 4.9 million people aged 18 years and over (9.8%) smoked cigarettes in the UK in 2025, down from 10.6% in 2024, continuing the long-term decline in smoking, according to the latest report from the UK’s Office for National Statistics (ONS).

But as smoking rates fall, vaping has become increasingly common. In Great Britain, around 5.4 million people aged 16 years and over (9.9%) used an e-cigarette daily or occasionally in 2025, according to the ONS Opinions and Lifestyle Survey.

For the second consecutive year, e-cigarette use was higher than cigarette smoking. In 2025, there were around:

• 5.4 million current e-cigarette users
• 4.8 million current smokers

The proportion of adults using e-cigarettes has also increased over the longer term, rising from 6.4% in 2020 to 9.9% in 2025.

Vaping Highest Among 25-34-Year-Olds

Also read: FDA To Speed Up Approval Process For Vapes & Nicotine Pouches: Does It Mean They Are Safer Than Cigarettes?

E-cigarette use was highest among people aged 25 to 34 years, with 16.4% reporting daily or occasional use.Overall, 6.5% of people aged 16 and over reported vaping daily in 2025, slightly down from 6.7% in 2024. Another 3.4% reported occasional use, up from 3.3%.

The ONS data also show that vaping is not limited to current smokers. In 2025, 7.2% of people reported having previously used an e-cigarette, up from 6.6% in 2024, while the proportion who had never used one fell slightly from 83.4% to 83.0%.

What’s In A Vape?

Vaping is often perceived as a cleaner alternative to smoking because e-cigarettes do not burn tobacco. However, the aerosol produced by these devices can contain substances that may affect the lungs and cardiovascular system.

Unlike harmless water vapour, e-cigarette aerosol may contain:

• Nicotine, which is highly addictive
• Heavy metals, including lead, nickel and tin
• Volatile organic compounds, some of which can be harmful
• Flavoring chemicals, which may have different effects when inhaled
• Ultrafine particles that can penetrate deep into the lungs

“Inhaling these substances directly into the lungs introduces not just nicotine, but also numerous potentially carcinogenic and lung-damaging compounds,” said Dr. Arun Chowdary Kotaru, Head and Senior Consultant of Pulmonology & Sleep Medicine.

“This is not harm reduction—it’s harm diversification.”

Why Are Non-Smokers Turning To Nicotine?

Vaping was initially promoted as a smoking-cessation aid and is generally considered less harmful than smoking combustible cigarettes. However, e-cigarettes are not risk-free.

The concern is particularly relevant for people who have never smoked. For them, taking up vaping can introduce a new source of nicotine exposure and dependence rather than replacing an existing smoking habit.

“Vaping is not harmless,” warns Dr. Arun. “Even if it may contain fewer toxic chemicals than traditional cigarettes, it still delivers a cocktail of harmful substances that are anything but safe.”

Nicotine exposure is also a concern for adolescents because the brain continues developing into the mid-20s.

“The teenage brain is still developing until around the age of 25,” explains Dr. Kotaru. “Nicotine interferes with areas responsible for learning, impulse control, and mood regulation. Early exposure can also set the stage for a lifelong struggle with addiction, increasing vulnerability to other substance abuse later in life.” .