Mysterious Fog in the US , Canada and UK: A dense, eerie fog with a "burning chemical-like smell" has spooked a good part of North America and parts of the United Kingdom and Canada. With social media amplifying all concerns, this phenomenon has sparked attention across all social media platforms. However, at the heart of this mysterious fog are a conjunction of natural events, social psychology, and environmental conditions that culminated in all the conspiracy theories and public health fears. Here's a closer look at the mysterious fog, its potential causes, and the societal response it has triggered.

Fog that Feeds Fear

The first reports of this "mysterious fog" came in from Florida where a resident said that they experienced respiratory symptoms, feverish warmth, and stomach cramps after contact with the fog. Similar stories started flooding social media, and within a day or two, a sinister force seemed to sweep across the United States, Canada, and parts of the UK. From Texas to Minnesota, people reported weird odors and health issues that they thought were linked to this bizarre atmospheric event.

Some witnesses were said to see "white particles" swirling through the air; theories ranged from a chemical attack or experimental weapon to drone-related chemical dispersals and references to historical military experiments, such as the infamous 1950s "Operation Sea-Spray."

Fuel to the fire were added when videos and posts, hundreds of thousands in number, began circulating on social media sites like TikTok and X (formerly Twitter) speculating on the origin of the fog. Hashtags like #ToxicFog went trending for days. Hysteria created a self-reinforcing loop in which every post spurred further scrutiny and fear.

Scientific Explanation of the Dense Mysterious Fog

1. What is Fog?

Fog is essentially a low-lying cloud formed when the air temperature cools to its dew point, causing water vapor to condense into tiny droplets or ice crystals. Several types of fog—advection fog, radiation fog, and valley fog—can form depending on conditions such as warm, moist air moving over cooler land or when temperatures plummet rapidly under clear skies.

2. Why the Chemical Smell?

Such chemical-like smell as reported during the occurrence of fog events is sometimes attributed to air pollution. It acts like a sponge, where it absorbs these pollutants, which include sulfur dioxide and nitrogen oxides, among others, that emit from industries. This mixture, therefore, leads to a stench that could be mistaken as unnatural or even toxic.

Also Read: Health Concerns Rise As US, Canada, and UK Come Under The Blanket Of Thick, Dense, Toxic Fog

3. What are the Health Concerns?

High moisture levels from fog can significantly exacerbate symptoms related to respiration, but especially in already predisposed asthmatics and allergy patients. The connection of these symptoms with actual fever, stomach cramps, and puffy eyes is too remote. Experts assume that the irritating effects of entrapped pollutants trapped in fog tend to affect more the eyes and throat rather than the rest of the body affected by some report.

Psychological Effects of Mass Panic Caused by Social Media

Social media amplified a natural weather event into a health epidemic. It made the personal experience of individuals become a cause for fear and speculation, a domino effect.

According to psychologists, this is a concept of selective perception, wherein once people's attention is drawn to environmental anomalies, they begin to notice them. This mirrors earlier panics, such as the Seattle windshield pitting panic of 1954. Then, atomic bomb testing caused fear in many and started to have people looking at their windshields for small marks that they had not seen before. Likewise, postings on the strangeness of the fog probably increased public awareness and suspicion, with people looking to attach unrelated symptoms to the phenomenon.

The fog hysteria shares a commonality with other instances of mass panic, such as the "drone sightings" of recent years or the Cold War-era fears of biological warfare.

Also Read: Mysterious Fog Is Making Americans Sick

These events underscore how fear can cloud judgment, especially when amplified by social media and sensationalist headlines. While historical cases, such as "Operation Sea-Spray," offer concrete evidence of the existence of unethical experiments, the jump from a natural weather condition to theories of chemical attacks exemplifies a more modern trend of connecting unrelated dots, all wonderfully seeded in distrust and anxiety.

Despite the swirling rumors, meteorologists and scientists are in agreement that the mysterious fog is not as alarming as it seems. It is well known that fog traps and amplifies pollutants, especially in urban and industrial regions. Moreover, winter months are the most conducive for fog formation, so its recent prevalence is unsurprising.

On the other hand, environmentalists advise that the fog should wake everyone up to increased levels of pollution. The reported odors and health irritations could be just symptoms of far deeper systemic issues like industrial emissions and lack of control over air quality.

The authorities must be transparent in their communication to combat misinformation and allay public fears. Governments and environmental agencies must provide timely updates on weather phenomena, air quality, and health risks. Initiatives like real-time pollutant tracking and public education campaigns can help demystify natural occurrences while addressing valid environmental concerns.

The mysterious Canada fog is a compelling case study in how environmental events intersect with psychology and societal dynamics. While rooted in natural phenomena, the fog became a vessel for collective fears, amplified by modern technology and historical anxieties.

In this information era where communication occurs at an almost lightning pace, the fog becomes a metaphor that reminds everyone about scientific literacy, environmental responsibility, and an effective balance when considering public concern. Whether perceived as a marvel of nature or as a tale that serves to teach, it left a very powerful mark in people's minds.

The World Health Organization (WHO) today released updated guidelines aimed at reducing the risk of cognitive decline and dementia, a condition that affects more than 57 million people worldwide.

Nearly 10 million people are diagnosed with dementia every year. While there is currently no cure, the WHO says up to 45 per cent of dementia risk can be prevented or delayed by addressing modifiable risk factors such as tobacco and alcohol use, physical inactivity, social isolation, air pollution, and noncommunicable diseases (NCDs), including high blood pressure and diabetes.

Beyond its impact on memory, thinking and daily functioning, dementia also affects a person's independence, dignity and safety.

"We know more today than ever before about what drives dementia risk, and these guidelines translate that knowledge into action," said Dr Tedros Adhanom Ghebreyesus, WHO Director-General.

"Countries now have clear, evidence-based recommendations they can put into practice immediately to protect people's cognitive health," he added.

What Do the Updated WHO Guidelines Say?

Also read: Healthy Lifestyle Changes Improve Memory, Thinking In Older Adults At Dementia Risk: The Lancet

The WHO last issued recommendations on dementia risk reduction in 2019. The global healthy body said that the updated guidelines incorporate the latest scientific evidence and innovations in dementia prevention. The revised recommendations also provide proven interventions that can lower dementia risk through early awareness and timely action.

Further, they present an opportunity to reduce the global burden of dementia by strengthening the integration of brain health with noncommunicable disease and mental health services.

Importantly, the updated guidelines recommend several healthy behaviors and lifestyle interventions to reduce the risk of cognitive decline and dementia, including:

• Cognitive training and cognitive stimulation

• Participation in social activities for adults with normal cognition or mild cognitive impairment

• Regular physical activity

• Quitting tobacco

• Reducing alcohol consumption

• Following a healthy diet

• Reducing exposure to air pollution

The WHO also recommends effective management of cardiometabolic conditions such as hypertension, diabetes and high cholesterol as part of dementia risk-reduction strategies. Hearing aids may also be offered where appropriate, it said.

WHO Warns Against Routine Supplements

The WHO does not recommend the routine use of vitamin B and E supplements, omega-3 polyunsaturated fatty acids (PUFA), or multivitamins and minerals to prevent cognitive decline or dementia in people without a diagnosed deficiency.

According to the organization, current evidence does not demonstrate sufficient benefit to outweigh potential harmful effects.

What Is Dementia?

Dementia is an umbrella term describing a significant decline in mental function that interferes with everyday life. It commonly affects memory, thinking and reasoning abilities and is caused by underlying conditions such as Alzheimer's disease or vascular dementia.

Read More: Normal Ageing or Alzheimer's? Doctors Explain Six Key Differences to Watch For

Common Signs of Dementia

• Memory problems

• Confusion

• Difficulty finding words

• Changes in mood or behavior

• Trouble completing familiar tasks

The Growing Global Burden

Dementia significantly affects an individual's ability to live independently, work and perform daily activities while placing a substantial burden on families and caregivers.

According to the WHO, dementia costs the global economy an estimated US$1.3 trillion every year, with about half of that amount attributed to unpaid care provided by family members and friends.

The WHO said understanding dementia risk factors and taking preventive action can improve health and quality of life, helping people live longer, healthier and more independent lives.

A simple blood test that measures androgen hormone levels could help diagnose endometriosis with more than 95 per cent accuracy, according to new research.

The University of Edinburgh-led findings offer hope for a faster, less invasive way to detect the condition, which affects an estimated 10 per cent of women of reproductive age worldwide—around 190 million people—and often takes years to diagnose.

The researchers found that women with endometriosis have a distinct androgen hormone profile in their blood, suggesting the condition could one day be identified through a simple blood test rather than invasive procedures.

Study Identifies a Unique Hormone Signature

Also read: NHS To Roll Out Two 'Gamechanger' Tests for Faster Endometriosis Diagnosis: Know How They Work

The research team analyzed blood samples from 159 women with confirmed endometriosis and 57 women without the condition. Their investigation focused on androgen hormones, including a lesser-studied group known as 11-oxygenated androgens, which are produced by the adrenal glands.

The researchers discovered that women with endometriosis consistently had higher levels of 11-ketotestosterone, one of the 11-oxygenated androgens.

Using this distinct hormone profile, the team was able to differentiate women with and without endometriosis, correctly identifying more than 95 per cent of those with the condition.

If validated in larger clinical studies, the test could reduce reliance on invasive diagnostic procedures such as laparoscopy and help women receive treatment much earlier.

The findings also provide new insights into the role of androgens in the development of endometriosis and may help guide future treatment strategies.

Why Androgens Matter

Endometriosis occurs when tissue similar to the lining of the uterus grows outside the womb. These cells respond to hormones, leading to inflammation, chronic pelvic pain and the formation of scar tissue.

While the disease is known to be influenced by the female hormones estrogen and progesterone, the role of androgens—often referred to as male hormones, though they are naturally present in women as well—has received comparatively little attention.

The researchers believe the newly identified androgen signature could improve understanding of how the disease develops and progresses.

Read More: 13.5 Million Children Remain Zero-Dose In 2025 Despite Global Vaccination Gains: UN Report

Why Earlier Diagnosis Is Important

Diagnosing endometriosis remains a major challenge. Current methods include ultrasound, MRI scans and laparoscopy—a surgical procedure in which a camera is inserted through a small incision in the abdomen to confirm the presence of endometrial-like tissue.

Because symptoms often overlap with those of other conditions, many women wait years before receiving a diagnosis. Earlier diagnosis could help reduce prolonged pain, limit disease progression and allow patients to begin treatment sooner, said the researchers, while stressing the need for larger studies.

What Is Endometriosis?

According to the World Health Organization (WHO), endometriosis is a chronic condition in which tissue similar to the lining of the uterus grows outside the uterus. It most commonly affects the ovaries, fallopian tubes and the tissue lining the pelvis.

The condition can begin with a person's first menstrual period and continue until menopause. Common symptoms include severe pelvic pain, painful periods, pain during intercourse, bowel or urinary symptoms during menstruation, and difficulty conceiving.

The recent rise in COVID-19 cases and deaths in Andhra Pradesh has renewed concerns over the virus, prompting neighbouring states such as Tamil Nadu and Odisha to step up surveillance. Andhra Pradesh has reported three COVID-related deaths along with several active cases.

However, health experts say the current situation does not indicate a major public health threat and have urged people to focus on prevention rather than panic.

Tamil Nadu's Health Department has also clarified that there is no evidence of a highly virulent COVID-19 variant circulating in the state. Officials noted that current COVID-19 infections remain lower than in previous years.

Virus Continues To Evolve

Also read: Omicron Sub-Lineages Likely Behind COVID Surge In India: Why Deaths Are Occurring

"The SARS-CoV-2 virus never truly disappears; it continues to resurface through new mutations. Viral strains naturally mutate as part of their evolution, making viral illnesses highly dynamic," Dr Abha Mashur, Pulmonologist at Lilavati Hospital and Research Centre, Mumbai, told HealthandMe.

She said the key concern is not the emergence of new variants, but the severity of disease they cause.

"At present, we are predominantly seeing upper respiratory involvement and milder cases of viral illness," said Dr Mashur, adding that Lilavati Hospital has admitted only one or two COVID-19 patients recently, all of whom required monitoring but experienced only mild illness.

Who Is At Higher Risk?

While most infections are mild, experts caution that certain groups remain vulnerable to severe disease. These include:

• Elderly individuals
• Pregnant women
• People with chronic heart disease
• Patients with COPD or interstitial lung disease (ILD)
• Those with chronic kidney or liver disease
• Immunocompromised individuals.

Read More: 13.5 Million Children Remain Zero-Dose In 2025 Despite Global Vaccination Gains: UN Report

Omicron Subvariants Circulating In India

According to Dr Mashur, the current wave is being driven by Omicron subvariants — the JN.1 variant and the BA.3.2 variant — that remain highly transmissible but are not causing severe illness in most people.

JN.1: The expert explained that the JN.1 variant is highly transmissible and possesses enhanced immune-evasion capabilities, allowing it to partially bypass immunity from previous infection or vaccination. However, she said it continues to cause predominantly mild illness compared to earlier variants.

BA.3.2: The BA.3.2 variant has accumulated a large number of mutations, raising concerns about immune escape. Despite this, available evidence suggests it has not led to more severe disease and is not currently considered a cause for alarm.

No Need for Panic

The experts stressed that the current rise in cases should encourage vigilance rather than fear. Vaccination, masking in high-risk settings, and early medical consultation remain the most effective tools to reduce transmission and protect vulnerable populations.

"The current situation should not create panic, but should prompt people to seek medical attention early. Those who develop symptoms of a viral infection should avoid public spaces and consult a doctor promptly so that transmission can be curtailed at the earliest," Dr Mashur said.

Dr Neha Rastogi, Senior Consultant, Infectious Diseases, Fortis Memorial Research Institute, Gurugram, urged people to continue following basic preventive measures.

"To reduce the risk of infection, people should stay up to date with COVID-19 vaccinations, wear masks in crowded indoor settings, maintain hand hygiene, ensure good ventilation, and avoid close contact when unwell. Anyone experiencing symptoms such as fever, cough, or breathlessness should get tested and seek timely medical advice."