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.

UK health officials have identified seven more cases of meningitis, as part of the latest outbreak in Kent, taking the total number of cases to 27. They expect the numbers to rise in the coming days.

The UK Health Security Agency noted that it has expanded the Meningitis B vaccine regimen to everyone who has been offered preventative antibiotic treatment as part of this outbreak.

“15 laboratory cases are confirmed and 12 notifications remain under investigation, bringing the total to 27,” the UKHSA said in a statement.

“Currently, cases have been confirmed in students at 4 schools in Kent, as well as one student at a higher education institution in London (who is confirmed to be directly linked to the outbreak),” it added.

Two students -- a 21-year-old student at the University of Kent and a teenage student at a school in the town of Faversham have died in the outbreak.

A 9-month-old baby from Folkestone is reportedly battling for life in the intensive care unit.

Meanwhile, another university in the city confirmed a case of meningitis. The student at Canterbury Christ Church is believed to be a man who was at the nightclub and part of the initial cluster of 20 known cases, who visited Club Chemistry in Canterbury between March 5 and 7.

"We are not in the position yet to say definitively that it's been contained," Dr Anjan Ghosh, Director of Public Health at Kent County Council, told BBC Radio, adding that secondary transmissions needed to be ruled out.

Calling the outbreak “unprecedented”, Health Minister Wes Streeting said: “The number of suspected cases was expected to increase ‌in ⁠the coming days because the disease had a seven- to 10-day incubation period”, Reuters reported.

In a typical year, Britain sees about 350 cases, roughly one per day, according to government estimates.

In addition to the approximately 5,000 students who were initially contacted, vaccination will now be extended to everyone who has been offered preventative antibiotic treatment as part of this outbreak, the UKHSA said.

Why The Cases Are Rising

While it remains unclear why the outbreak has been so large, “the large number of cases all originating from what seems to be a single event” is particularly striking, Prof Robin May, the chief scientific officer at the UKHSA, told the BBC Breakfast.

May said that "there might be something about the kind of behaviors that individual people are doing." Another probable reason "is that the bacteria may have evolved to be better at transmitting".

Both the UKHSA and the European Centre for Disease Prevention and Control maintain that the risk of invasive meningococcal disease to the general population in Europe is "very low".

Also read: From Vaping to Worm Attack: 5 Unimaginable Ways to Contract Meningitis

Can The Outbreak Be Prevented?

The UKHSA noted that the key intervention to protect people and halt the spread remains for people to come forward for antibiotic treatment -- effective in preventing contraction and spreading in 90 percent of cases.

In addition, a targeted MenB vaccination program is also being introduced for longer-term protection.

“By extending the vaccination program to everyone who has been offered preventative antibiotics, we are taking an important additional step to protect those most likely to have been exposed. The message is simple: if you have had the antibiotic, you are also eligible for the vaccination,” said Professor Susan Hopkins, Chief Executive of the UKHSA.

However, Trish Mannes, UKHSA Regional Deputy Director for the South East, noted that even after two doses, the MenB vaccine “does not protect against all strains of meningococcal disease, nor against all infections that can cause meningitis. It also does not prevent the bacteria from being carried and spread in the community”.

The UKHSA thus warned people to be aware of the signs and symptoms of invasive meningococcal disease, and to seek immediate medical attention if they or anyone they know develops these signs and symptoms.

Common symptoms include:

• rash
• sudden onset of high fever
• severe and worsening headache
• vomiting and diarrhoea
• joint and muscle pain
• seizures.

The widespread use of Azithromycin to treat hospitalized patients during the COVID-19 pandemic increased the risk of antimicrobial resistance -- a major global health problem, according to a new study, published in the journal Nature Microbiology.

Scientists at the University of California-San Francisco (UCSF) noted that using azithromycin inappropriately for even a single day can trigger antibiotic resistance in the respiratory tract.

While azithromycin is effective against bacterial infections that cause strep throat, pneumonia, and sexually transmitted diseases, it does not work against viruses.

"We've known for years that antibiotics don't treat viral infections, but these results were striking," said Chaz Langelier, from UCSF.

"That we could see resistance genes turning on in the respiratory tract within a day tells us the consequences of unnecessary antibiotic use aren't theoretical or long-term. They're immediate, measurable, and biologically real," Langelier added.

The study analyzed nasal swabs of 1,164 adults hospitalized for COVID-19 to examine the changes that occurred in the microbiome of hospitalized patients who were treated for COVID.

Compared to people who received no antibiotics, patients administered azithromycin reported changes that persisted for more than a week. These include:

• Changes in the mix of microbes in the upper airway
• Decrease in harmless bacteria,
• Surge in potentially harmful bacteria such as Staphylococcus and Klebsiella.

Rising Global Antimicrobial Resistance

Antimicrobial resistance (AMR) occurs when germs develop the ability to defeat the drugs designed to kill them.

It is one of the 10 top global health threats, undermining the effectiveness of essential treatments and placing millions at risk of untreatable infections.

As per WHO data, AMR is an urgent global public health threat, killing at least 1.27 million people worldwide and associated with nearly 5 million deaths in 2019.

In the US alone, more than 2.8 million antimicrobial-resistant infections occur each year. More than 35,000 people die as a result, according to the CDC's 2019 Antibiotic Resistance (AR) Threats Report.

The WHO, in a 2025 report, noted that one in six laboratory-confirmed bacterial infections causing common infections in people worldwide in 2023 were resistant to antibiotic treatments.

Between 2018 and 2023, antibiotic resistance rose in over 40 percent of the monitored antibiotics with an average annual increase of 5-15 percent.

US Early Death Toll During COVID Much Higher

About 16 per cent of COVID-19 deaths went uncounted early in the pandemic in the US, according to a separate study, published by the journal Science Advances.

While about 840,000 COVID deaths were reported on death certificates in 2020 and 2021, the researchers using artificial intelligence (AI) decoded that as many as 155,000 unrecognised additional deaths likely occurred in that time outside of hospitals.

The US Food and Drug Administration has approved Johnson & Johnson's once-daily pill for psoriasis -- a chronic skin disease.

Icotyde is an interleukin-23 (IL-23) receptor antagonist approved for the treatment of moderate-to-severe plaque psoriasis in adults and pediatric patients 12 years of age and older.

Psoriasis is an autoimmune condition that causes rough patches of skin. The new once-daily pill has been found safe and also delivers complete skin clearance.

Also Read: Why Regulatory Clarity Is Important for Safe Aesthetic Procedures in India

In the statement, J&J said that the approval will lead to a first-line systemic treatment of plaque psoriasis with a targeted oral peptide.

“Icotyde delivers something unique in psoriasis treatment – combining skin clearance with a favorable safety profile in a once‑daily pill, making it an easy addition to a patient’s routine,” said Linda Stein Gold, Director of Dermatology Clinical Research at Henry Ford Health.

The novel pill also aligns with the recent International Psoriasis Council guidance that suggests transitioning to systemic therapy if two cycles of topical medications applied for four weeks fail to bring meaningful improvement.

Icotyde will prove to be “a potential game‑changer for many adult and adolescent patients”, Gold said.

The FDA’s approval is based on an unprecedented body of evidence from the phase three clinical trial, which simultaneously evaluated Icotyde in adults and adolescents, and found it a safe and effective oral pill, and also better than injectables and topical creams.

According to analysts from Wall Street, Icotyde has "blockbuster potential," and the once-daily medication could capture significant market share from injectables like Skyrizi and J&J's own Tremfya, Reuters reported.

J&J is also studying the ⁠drug, chemically known as icotrokinra, for ulcerative colitis, psoriatic arthritis, and Crohn's disease.

What Is Psoriasis?

Psoriasis develops when the body makes skin cells too quickly. It causes skin cells to pile up and form visible patches or spots on the skin, which may be itchy or painful.

The condition, however, is not contagious.

According to the National Psoriasis Foundation, the skin disease affects 8 million Americans and more than 125 million people worldwide.

The condition impacts physical comfort and quality of life, especially when lesions are on visible or sensitive areas.

The plaques typically appear as raised patches with a silvery white buildup of dead skin cells or scales. They can appear anywhere on the body, although they most often appear on the scalp, knees, elbows, and torso.

Who Can Use Icotyde

Icotyde is currently approved in the US for the treatment of people with moderate-to-severe plaque. It can be used by

• adults, and pediatric patients 12 years of age and older
• who weigh at least 40 kg.