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.

Flu activity is rising unusually early in parts of the US, UK and Japan, while COVID-19 cases are also increasing in the UK. Health experts are urging eligible people to get vaccinated ahead of winter, when respiratory infections can add to pressure on hospitals.

According to Nature, flu tests are returning positive at unusually high rates for early fall on the US West Coast and in the UK. In Japan, outbreaks in August and early September forced some schools to close as students returned from summer break.

“It would be an incredibly early season” for the US if cases on the West Coast continue rising at their current pace, Scott Hensley, a virologist at the University of Pennsylvania, told Nature. US flu activity typically peaks in December and January.

H1N1 Dominates Flu Cases In The US

Also read: ‘American Covid’ Strain Drives 50% Surge in UK Hospital Admissions: XFG Symptoms to Know

H1N1 accounted for 96% of US flu cases tested for type in the week ending September 26. H3N2 accounted for nearly all the remaining cases, while no influenza B was detected, Nature reported, citing federal data.

The Centers for Disease Control and Prevention (CDC) classified the 2025–2026 US flu season as moderately severe, with more than 32 million cases, 390,000 hospitalizations and up to 81,000 deaths. Cases rose in November and peaked in December.

This season, flu activity began rising in August and September in western states, including California, Washington, Alaska and Hawaii.

“We’re looking at an early flu season this year,” James Watt, deputy director of infectious diseases at the California Department of Public Health, said at an October 6 briefing, according to the San Francisco Chronicle.

Danielle Zerr, an infectious diseases specialist at Seattle Children’s, told The Washington Post that the early spread was concerning because many people had yet to be vaccinated.

“The way flu is circulating now, you wanted that vaccine in you two weeks ago, if not even a little before that,” she said.

UK Reports Flu And COVID-19

Read More: XFG COVID Variant: What India Should Watch As Cases Rise In UK And France

In the UK, around 6.5% of flu tests were positive in the week reported by the UK Health Security Agency (UKHSA), up from 5% the previous week. This compares with 3.3% at the same point last year.The early rise has raised concerns that flu could add to pressure on the National Health Service (NHS), which has already experienced a busy summer. University students returning to campuses may also be contributing to the spread.

COVID-19 activity has increased as well. Reported infections rose from 1,374 in August to 4,589 in September, the highest monthly total since October last year, according to figures cited in reports. However, officials said levels of both infections remained within the expected range.

Frankie Swords, national medical director at NHS England, warned of early signs of winter pressure on hospitals. Around two in every 100,000 people in England were being hospitalized with flu, while overall hospital capacity was approximately 95% occupied in September.

Swords urged eligible people to get vaccinated early, warning that pressure could increase as temperatures fall.

Since the start of September, around 3.9 million people in the UK had received a flu vaccine, while approximately 730,000 had received an autumn COVID-19 vaccine.

France is also reporting a rise in COVID-19 cases as the government prepares to launch its autumn COVID and flu vaccination campaign on October 13.

Flu Symptoms You Should Know

Flu often begins suddenly, causing fever, chills, body aches and extreme fatigue.

Common symptoms include:

• Fever and chills
• Body aches
• Extreme fatigue
• Headache
• Sore throat
• Runny or stuffy nose
• Cough

Children may also experience vomiting and diarrhea. Flu symptoms can overlap with those of other respiratory infections, so testing may be needed to confirm the cause.

Do Flu Vaccines Protect Against All Circulating Strains?

Seasonal flu vaccines are designed to protect against selected influenza strains, including H1N1, H3N2 and influenza B viruses.

However, influenza viruses can undergo genetic changes known as antigenic drift, which may reduce vaccine effectiveness against circulating strains.

Flu and COVID-19 vaccines target different viruses. A flu shot does not protect against COVID-19, so eligible people may need separate vaccinations to reduce their risk of severe illness from both infections.

Cancer is a dreaded diagnosis. Along with the physical and emotional toll, patients and their families face the financial burden of treatment, as cancer medicines can be extremely expensive. In a major relief for patients, India has approved a cap on the trade margins charged in the supply and sale of non-scheduled anti-cancer medicines.

According to the Department of Pharmaceuticals under the Ministry of Chemicals and Fertilizers, these margins will be capped at 30% of the Maximum Retail Price (MRP).

“The measure is expected to reduce medicine prices by up to 70% and help cancer patients save Rs 2,500 crore annually, significantly reducing the amount they pay from their own pockets,” the Ministry said in a statement.

Essential cancer medicines included in the scheduled list are already subject to government-mandated ceiling prices. The new decision extends price protection to non-scheduled cancer medicines, which fall outside that list, by limiting the trade margins added as medicines move through the supply chain.

Rising Cancer Burden And Drug Costs

Also read: Indian Medical Industry Backs Maharashtra FDA Crackdown On Device Markups

Cancer treatment places a substantial financial burden on patients and their families, who often have to pay significant amounts out of pocket. In India, approximately 60 people per lakh population are affected by cancer.

According to a National Pharmaceutical Pricing Authority (NPPA) analysis of market data, non-scheduled anti-cancer medicines carry an average price markup of approximately 170%, reaching 700% or more in some cases.

Prices can rise sharply as a medicine moves through the supply chain before reaching the patient. They also vary significantly depending on whether medicines are purchased from retail pharmacies, hospital pharmacies or online pharmacies.

The new cap aims to curb excessive trade margins, address unfair pricing practices and help ensure fairer prices for patients, particularly those who require expensive cancer medicines.

Supreme Court Flags Steep Markups On Cancer Drugs

Read More: Antibiotic Costing ₹86 Carries MRP Of ₹4,528: Karnataka FDA Flags Massive Drug Price Gaps

State authorities, including those in Maharashtra, Rajasthan and Karnataka, along with patients and civil society groups, have raised concerns about excessive medicine prices.

Recently, the Supreme Court also questioned the Centre over the steep prices of life-saving medicines, particularly cancer drugs.

The Court pointed to the absence of adequate price-control mechanisms and sought to know why certain medicines remain outside the scope of the Drugs (Prices Control) Order (DPCO).

During the hearing, Justice Sandeep Mehta highlighted the significant markups on cancer medicines, citing an example in which a drug supplied to retailers for approximately Rs 3,000 was being sold at an MRP of Rs 27,000.

“27,000 MRP of a cancer drug, price to retailer is around 3000. Just see the drastic difference,” Justice Mehta stated.

The Bench also questioned the government over the absence of a uniform criterion of 16%.

The Court had previously flagged a similar instance involving a cancer medicine priced at Rs 2,700 but sold for Rs 27,000, raising concerns about the financial burden on patients who require life-saving treatment.

In February 2019, at the government's direction, the NPPA capped trade margins on 42 selected non-scheduled anti-cancer medicines under Paragraph 19 of the Drugs (Prices Control) Order, 2013.

The decision reduced MRPs by up to 91%, with reported annual savings of ₹984 crore across 526 brands. It significantly eased the financial burden on cancer patients.

Which Cancer Drugs Will Be Covered?

The intervention will cover non-scheduled anti-cancer medicines across categories, including branded and generic, domestically produced and imported, and patented and non-patented drugs.

An expert committee under the Directorate General of Health Services (DGHS) will finalise the list of medicines to be covered. The NPPA will then take a decision and issue the notification.

The Ministry said manufacturers of non-scheduled anti-cancer medicines will be required to maintain their current production levels to ensure that these life-saving drugs remain available.

Shigellosis, an intestinal infection caused by Shigella bacteria, is becoming harder to treat as drug-resistant strains spread in the US and UK.

Although the infection can spread through contaminated food and water, sexually transmitted Shigella has become an established part of transmission in some communities, particularly among gay, bisexual and other men who have sex with men (GBMSM).

An estimated 450,000 people acquire shigellosis each year in the US. While the infection can affect anyone, some strains have developed resistance to multiple antibiotics, making treatment increasingly challenging.

Drug-Resistant Shigella Rising In The US

A CDC analysis published in April 2026 found that extensively drug-resistant (XDR) Shigella isolates increased in the US between 2011 and 2023. Among 16,788 isolates analyzed, the proportion classified as XDR rose from 0% in 2011–2015 to 8.5% in 2023.

The CDC report found that 86.2% of XDR shigellosis patients with available sex data were men. However, sexual exposure information was not routinely collected, so the findings do not establish that these infections were sexually transmitted.

Molecular biologist Shangxin Yang said healthcare workers at the University of California, Los Angeles (UCLA), are now seeing roughly one case of extensively drug-resistant Shigella a month, compared with just one case throughout 2022.

"It's almost like an explosion of this pathogen in the community," Yang told CIDRAP News at the University of Minnesota.

The CDC has warned that XDR Shigella infections pose a treatment challenge because these strains are resistant to multiple antibiotics, and no FDA-approved oral antimicrobial treatment is available for them.

Sexually Transmitted Shigella Spreading Faster In The UK

A July study published in The Lancet Infectious Diseases found that sexually transmitted Shigella strains are spreading faster than non-sexually transmitted strains in the UK and developing resistance to key antibiotics.

Over an evolutionary period of about 2.5 years, sexually transmitted strains spread an average of 117 kilometers between related cases, compared with 46 kilometers for non-sexually transmitted strains.

“Many men who have sex with men are unaware of the serious and increasing risk posed by sexually transmitted Shigella,” said Professor Kate Baker, senior author of the study from the University of Cambridge's Department of Genetics.

Baker said sexually transmitted shigellosis should be treated as a distinct public health threat requiring different surveillance, prevention and treatment strategies.

Why Is Sexually Transmitted Shigella Becoming Drug-Resistant?

Cambridge researchers found that antibiotic-resistant sexually transmitted Shigella strains were spreading 71% faster than drug-susceptible strains. More than 70% of sexually transmitted strains were resistant to at least one clinically important antibiotic.

“This isn’t just one form of sexually transmissible diarrhea. This is multiple overlapping variants emerging that are all quickly becoming resistant to the drugs we use to treat them,” Baker said.

They believe the rise in resistance may partly be driven by antibiotics prescribed to treat or prevent other sexually transmitted infections (STIs), including gonorrhea.

“Our evidence suggests that the variants of Shigella transmitting in sexual networks were actually getting resistant against treatments for other STIs, like gonorrhoea, so people need to remember that when they’re taking antibiotics they’re treating their whole body,” Baker said.

Another possible factor is bystander resistance, in which antibiotic exposure affects bacteria other than the intended target and can favor the survival and spread of resistant bacteria.

How To Prevent Sexually Transmitted Shigella

Precautions to reduce the risk of sexually transmitted shigellosis include:

• Avoiding sexual activity during illness: Do not have sex while experiencing diarrhea or recovering from a recent diarrheal illness.
• Waiting before resuming sexual activity: Wait at least two weeks after fully recovering before having sex again.
• Telling your healthcare provider about possible exposure: Mention your sexual history if you seek care for diarrhea or related symptoms.
• Asking about testing: Seek advice on appropriate testing and sexual health screening if you may have been exposed.

People experiencing symptoms should seek medical advice. Because some Shigella strains are resistant to multiple antibiotics, treatment should be guided by a healthcare professional, who can determine the appropriate approach based on the infection and its resistance profile.