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.

Scientists have discovered an Achilles' heel that helps some of the most aggressive cancers escape treatment. The discovery that could pave the way for new targeted therapies against specific drug-resistant tumours.

Researchers at Nanyang Technological University (NTU) Singapore, identified a protein called TEX264 that enables cancer cells to escape the therapeutic effects of a widely used class of targeted cancer drugs known as PARP inhibitors. The study is published in Nature Cell Biology.

What Does This Mean For Drug-Resistant Cancers?

The findings could have positive implications for patients with triple-negative breast cancer, as well as ovarian, prostate, and pancreatic cancers that are treated with PARP inhibitors. These cancers eventually become resistant to the drugs.

"Our findings have identified a new biological process involving TEX264 as a key mechanism of drug resistance in an aggressive form of cancer," said Professor Kristijan Ramadan, who led the research. "We coined this new biological mechanism 'autophagy of DNA lesions', or simply 'nucleophagy'. This makes TEX264 a potential target for future cancer therapies."

Also read: Don't Fear The Biopsy, Fear The Delay

How Do Some Cancers Escape Treatment?

PARP inhibitors work by blocking PARP1, a protein that repairs damaged DNA inside cancer cells. Without this repair system, tumour cells accumulate DNA damage and die. However, many cancers eventually become resistant to this treatment.

The researchers discovered that TEX264 helps remove trapped PARP1 proteins from damaged DNA through a newly identified clean-up process called nucleophagy, allowing cancer cells to continue repairing themselves and escape the treatment. This is the cellular recycling system that makes cancer resistant to treatments.

When scientists blocked TEX264 in experiments, PARP1 remained stuck on DNA, DNA damage accumulated, and the cancer cells became far more vulnerable to therapy.

Also read: US FDA Approves New Blood Test To Screen For Colorectal Cancer

What Are PARP Inhibitors?

They are approved for several cancers, including ovarian, breast, prostate, and pancreatic cancer.

While many patients initially respond well, resistance develops in an estimated 40% to 70% of breast and ovarian cancer cases.

Also read: Scientists Find Rare Contagious Skin Cancer In Fish From US, Canada: Should Humans Worry?

Importance Of This Study

Instead of targeting the DNA repair machinery directly, the new study targets an entirely different weak spot, the cellular cycle that cancer cells exploit to discard damaged repair proteins.

Researchers believe drugs that inhibit TEX264 or block nucleophagy could potentially restore the effectiveness of existing PARP inhibitors, offering a new targeted treatment strategy for patients whose cancers no longer respond to therapy.

The researchers caution that the findings are currently based on laboratory studies, and more research, including clinical trials, will be needed before therapies targeting TEX264 can reach patients.

The promising results adds to growing efforts worldwide to overcome one of oncology's biggest challenges: preventing cancers from evolving resistance to life-saving treatments.

The World Health Organization (WHO) has updated its treatment guidelines for visceral leishmaniasis (VL), commonly known as kala-azar, and post-kala-azar dermal leishmaniasis (PKDL).

Through this update, WHO is recommending shorter, safer and more patient-friendly treatments that could improve outcomes for thousands of patients across eastern Africa and South-East Asia.

The revised guidance marks the first major update in nearly two decades for these forms of leishmaniasis.

It introduces new treatment options, including the use of oral miltefosine in combination therapies, reducing the need for long courses of painful daily injections.

What Is PKDL?

Post-kala-azar dermal leishmaniasis (PKDL) is a skin condition that appears months or years after a patient recovers from visceral leishmaniasis.

Visceral leishmaniasis, also known as kala-azar or black fever, is a life-threatening parasitic disease caused by Leishmania. It is spread by infected female sandflies. It attacks internal organs like the spleen and liver and is almost always fatal if left untreated.

In post-kala-azar, while patients usually feel well, they develop patches, papules or nodules on the skin that harbour the parasite. This allows sandflies to transmit the infection to others.

Early diagnosis and effective treatment of PKDL are therefore considered essential for interrupting transmission and elimination of kala-azar.

Also read: Uganda Declared Ebola-Free As Congo Outbreak Grows To 3,262 Cases, 1,437 Deaths

About The New Treatment Guidelines

WHO now recommends a 14-day regimen combining oral miltefosine with once-daily paromomycin injections for patients with primary visceral leishmaniasis in eastern Africa.

The new approach replaces older sodium stibogluconate-based regimens that required 17 days of treatment, 34 injections, which were often associated with toxicity.

The guidelines also introduce shorter treatment options for PKDL. For patients in eastern Africa and South-East Asia, WHO recommends new combination treatments that substantially shorten duration. It also allows part of the therapy to be completed at home.

Dr Daniel Ngamije Madandi, WHO Director of Malaria and Neglected Tropical Diseases, "For too long, patients suffering from leishmaniasis have endured treatments nearly as punishing as the disease itself. By recommending safer, shorter and more patient-friendly regimens, we are not just improving care; we are accelerating our fight to eliminate this devastating disease and offering renewed hope to communities across Africa and Asia."

Also read: Ebola Scare In The UK After Humanitarian Worker Monitored In London Hospital; Here's what Happened

Milestone In PKDL Treatment

The updated recommendations also revise the safety guidance for miltefosine in line with advice from the WHO Advisory Committee on the Safety of Medicinal Products and introduce allometric dosing to help optimise treatment across different body weights.

Kala-azar is one of the world's deadliest parasitic diseases after malaria. According to WHO, eastern Africa accounted for nearly 79% of global visceral leishmaniasis cases in 2024, with around half of patients being children under the age of 15.

Transmitted through the bite of infected female sandflies, it causes prolonged fever, weight loss, anaemia and enlargement of the spleen and liver. If left untreated, the disease is fatal in up to 95% of cases.

Maharashtra Food And Drug Administration (FDA) has taken a significant step towards promoting healthy eating habits in children. On Wednesday, FDA commissioner Tukaram Mundhe announced that foods and drinks high in fat, sugar, and salt should not be sold within 50 metres of school premises.

"Within school premises and up to 50 metres from the school compound, the sale, advertisement and free distribution of high fat, salt and sugar (HFSS) food items is completely banned by the FDA. It will be implemented strictly," Mundhe said.

Why Did Maharashtra FDA Ban The Sale Of HFSS Food Items?

HFSS food items could neither be sold, advertised, nor distributed free of cost within the prescribed limits around schools in Maharashtra anymore.

The recent ban covers popular junk food items like vada pav, samosas, deep-fried snacks, chips, cold drinks, sugary beverages, chocolates and ice cream.

Mundhe said the state government had issued a compliance order on July 27 to enforce food safety and nutritional standards across educational institutions.

He also said that the move would affect nearly two crore students studying in around 1.08 lakh schools in Maharashtra.

The guidelines would apply to all government, government-aided and private schools affiliated to any education board, meaning that no educational institution would be exempt from the ban.

Also read: No More 'Buy 1 Get 1 Free': After UK, Northern Ireland Restricts Promotion Of Unhealthy Foods To Tackle Obesity

He also said that canteens, midday meal kitchens, food suppliers and hostel kitchens catering to schools must obtain mandatory registration and licenses under food safety regulations.

He added, "No organisation or institution can prepare or supply food to schools, hostels or under the midday meal scheme without registration and a valid license to operate."

He said school principals, headmasters and local authorities would play a key role in implementing the restrictions.

According to the guidelines, the move is applicable for children from 22 months of age up to students studying in Class 12.

Experts React

Also read: Nearly 1.6 Million Dozen Eggs Recalled in US Over Potential Salmonella Contamination: FDA

HealthandMe spoke to Dr Rahul Verma, Director of Paediatrics and Neonatology at Sir H.N. Reliance Foundation Hospital, Mumbai, about the impact this move would have on children's health.

Dr Verma says that rather than viewing the decision only as a ban on junk food, it should be seen as an attempt to reshape children's food environment.

He says, "When healthier choices become the default in schools, children are more likely to develop better eating habits that can continue into adulthood. Reaching over 1.08 lakh schools and nearly 2 crore students from preschool to Class 12 gives this initiative the potential to influence an entire generation at a stage when lifelong dietary preferences are still being formed."

He also said that the policy also goes beyond simply removing HFSS foods. By making FSSAI licensing mandatory for school canteens, introducing regular compliance checks, and encouraging the inclusion of nutritious foods such as fruits, pulses, and whole grains, it creates a structured system that supports healthier eating rather than relying on restrictions alone.

In an X post, Dr. Sivaranjini, a pediatrician, suggested a different approach which seems to be a much simpler way of differentiating between healthy and unhealthy foods.

She wrote, " Front-of-pack label (FOPL) warnings are the simplest and most effective way to help people make better food choices in India. A clear “High in Sugar” or “High in Salt” or "High in Fat" warning takes seconds to understand. No calculations. No nutrition knowledge. Just a simple signal that says, 'Think twice'".

The doctor says that unhealthy, processed foods are often marketed as healthy due to misleading labels and claims on their packaging.

She added, "The problem with systems like Nutri-Score or Health Star Ratings is that they average everything into one score. A product loaded with sugar can still look “healthy” because it has added protein, fiber, or vitamins."

Providing real-life examples, she informed, "A sugary breakfast cereal still gets HIGH IN SUGAR, even if fibre and vitamins are added to it. An instant noodle high in sodium still gets HIGH IN SODIUM even if protein and vitamins are added to it. A packaged fruit juice with excessive free sugars still gets HIGH IN SUGAR, though it's directly from the fruit."

Although the move is a positive step towards protecting children's health, sustained success will depend on whether healthy food remains accessible, affordable, and appealing to children. If children continue to consume highly processed foods outside school or at home, the long-term benefits may be limited.