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 US Food and Drug Administration has expanded the recall of frozen blueberries and berry blends after an outbreak of E. coli O145 linked to frozen organic blueberries sickened 17 people in two states.

The latest recall does not mean that the outbreak is growing. The CDC recently declared that the outbreak was over on September 21, with no new illnesses reported since then. But on October 2, the company at the centre of the investigation expanded its recall to include additional batches of frozen berry products after the FDA obtained new information during an onsite inspection.

The agency said the company had previously not provided all records requested by FDA investigators. After obtaining additional information, the FDA identified more products that could be contaminated and the company expanded its recall.

The FDA has also added the Chilean company, Frutas y Hortalizas del Sur S.A.. to Import Alert 99-35, which means that frozen blueberries from the company entering the US can be detained without physical examination.

Which Frozen Berries Are Now Recalled?

Also read: Drinking Raw Milk Hospitalizes 2 Young Girls in US With Nearly Fatal E. Coli Infection: Health Risks Explained

The expanded recall involves products sold under Great Value and Trader Joe’s brands. The affected products include:

• Great Value Organic Triple Berry Blend, 10-ounce packages, with lot codes 6 031 01 and 6 041 01
• Great Value Organic Blueberries, 10-ounce packages, with lot codes 6 019 01, 6 040 01 and 6 163 01
• Trader Joe’s Organic Mixed Berry Blend, 12-ounce packages, lot code 6 051 01

The recalled Great Value products were distributed to Walmart stores in 30 states and Puerto Rico, while the recalled Trader Joe’s berry blend was distributed more widely through the retailer. Consumers who have the affected products should not eat them and should discard them or return them for a refund.

Some of the recalled products have 'Best By' dates extending into 2028, meaning they could still be sitting in consumers' freezers despite the outbreak having ended.

E. coli Left 17 Sick

Also read: After 488 Sickened & 65 Hospitalised In Salmonella Outbreak, FDA Issues Highest-Risk Recall For Salad Dressing

According to the CDC and FDA, 17 people were infected due to E. coli outbreak across Florida and Georgia. There were six hospitalisations and zero fatalities.

Infections were reported between May 11 and August 2, 2026. Among 13 people interviewed during the investigation, 11 reported eating frozen blueberries, which strengthened the epidemiological link to the packaged produce.

Earlier in the investigation, one sample of GreenWise frozen organic blueberries collected by Publix tested positive for the same E. coli strain responsible for the illnesses. This led to recalls that were subsequently expanded to other products from the same supplier.

Why Is E. Coli O145 Dangerous?

E. coli O145 belongs to a group known as Shiga toxin-producing E. coli (STEC). These bacteria can cause severe stomach cramps, diarrhoea, vomiting and, in some cases, bloody diarrhoea.

Most people recover, but the infection can sometimes lead to haemolytic uremic syndrome (HUS), a serious complication that can cause kidney failure. Young children, older adults and people with weak and strained immunity are particularly vulnerable to severe illness.

People who develop symptoms after eating a recalled product should contact a healthcare provider, particularly if they develop bloody diarrhoea, severe abdominal pain or signs of dehydration.

Consumers should also check their freezers rather than assume recalled products have already been removed from stores. The FDA says recalled products should no longer be available for sale, but some have long shelf lives and may still be at home.

Anyone with one of the affected lot codes should not taste the product to determine whether it is safe. It should be discarded or returned for a refund.

Russia has told the World Health Organization (WHO) that no cases of plague have been recorded in Irkutsk, the Siberian city that has sparked international headlines after a laboratory worker from an anti-plague research institute died after suspected exposure to pneumonic plague infection.

The WHO said Russian authorities responded on October 6 to its request for information under the International Health Regulations (IHR), saying the woman’s illness had initially appeared to be a typical acute respiratory viral infection.

Russia also reported that no plague case had been recorded in Irkutsk, either in the woman or among her contacts.

However, the exact cause of the woman’s death still remains unclear.

Russia Says No Plague Cases In Irkutsk

The WHO recently said, “WHO is aware of media reports that a laboratory worker in Irkutsk oblast, in the Russian Federation, died of suspected pneumonic plague, and that nearly 200 of her contacts were under medical observation and being tested."

“On 3 October, WHO asked the Russian authorities under the International Health Regulations (IHR) for any further information they had, so we could assess the risk.”

The WHO said Russia reported that “no case of plague has been recorded in Irkutsk, either in her or in anyone else.”

Adding further, the health body said, "They informed WHO that an epidemiological investigation had been conducted, preventive and control measures implemented, and identified contacts placed under medical observation and tested. They reported that no high-threat pathogens had been detected among the contacts and that medical observation of all identified contacts had been completed."

But the agency is still seeking an answer on what caused the fatal pneumonia as the lab worker's death still remains a mystery.

It said, “WHO has remained in contact with the Russian health authorities and has offered technical support. WHO has requested further information to clarify the cause of the severe pneumonia, the pathogen that prompted the public health measures, and media reports of a second employee with pneumonia of undetermined cause.”

Also read: Russia Plague Scare: What Black Death and Anthrax Outbreaks Teach Us About Lab Safety

Lab Worker's Death Still Remains Unexplained

The 28-year-old woman, identified by Russian media as Darya Shipilova, worked at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East. She died on October 2 after developing severe pneumonia of "unknown origin", according to Russian authorities.

Her death sparked precautionary measures including quarantine. According to reports, around 200 people who had contact with her placed under medical observation. Russian health authorities said testing of those contacts found no dangerous infectious-disease pathogens. Some contacts reportedly tested positive for COVID-19 or rhinovirus.

Reports circulating on social media claimed she may have been infected after a laboratory accident involving Yersinia pestis, the bacterium that causes plague. Russian authorities have rejected the laboratory-accident theory, and there is currently no independent evidence confirming that such an incident occurred.

Also read: Russia Plague Scare: Is Pneumonic Plague Deadlier Than Bubonic & Septicemic Plague?

What Could Confirm Plague?

Javier Pizarro-Cerda, head of the Yersinia Research Unit at the Institut Pasteur in Paris, told CNBC that he was “very surprised” by the reported death because laboratories handling plague generally use strict protective measures.

“You work with a full body suit. You work with masks. You work with gloves. So even if you break a tube, normally you should be protected,” he said.

Pizarro-Cerda also said Russia has a plague vaccine, although he described its protection as low and transient compared with standards elsewhere.

Pizarro-Cerda said plague testing can be performed rapidly and that an autopsy should provide evidence if the woman had pulmonary plague.

The laboratory worker reportedly died on October 2, giving authorities several days to conduct diagnostic tests. Still, there is no confirmation that pneumonic plague caused her death or that a laboratory accident occurred.

Key questions remain whether Yersinia pestis was detected, whether there was evidence of laboratory exposure, and whether genetic testing can establish the source of any infection.

The suspected plague is still being investigated. The concern stems partly from the nature of the institute where Shipilova worked. The facility studies dangerous pathogens, including plague, in a region where the disease occurs naturally among wild animals.

Pneumonic plague is the most severe form of plague because it affects the lungs and can spread between people through respiratory droplets. Plague is treatable with antibiotics when diagnosed and treated promptly.

The WHO has assessed the public-health risk as moderate-to-low for Irkutsk, low for Russia overall and very low for the WHO European region.

Aspirin has long been studied for its role in colorectal cancer prevention. But a new trial suggests that when aspirin is started may be of more importance compared to whether it is used at all.

In the latest study, researchers discovered that aspirin did not prevent cancer recurrence or improve survival in people whose colorectal cancer had already spread to the liver.

The study, published in The Lancet Gastroenterology & Hepatology, is based on 428 patients who were treated for colorectal cancer liver metastases at 14 hospitals across Norway, Sweden and Denmark. Participants were randomly assigned to receive either 160 mg of aspirin or a placebo every day for up to three years.

Aspirin Did Not Help After Cancer Had Spread

After treatment for their liver metastases, patients taking aspirin did not have better results than others who took placebo.

In fact, after three years, 76% of people in the aspirin group were alive compared to 85% in the placebo group. Researchers say that the overall survival was a secondary outcome. They also said that the trial was not designed to provide a definitive answer about that measure.

Serious adverse events were also more common with aspirin, occurring in 8% of the aspirin group compared with 2% of the placebo group. Reported complications included heart attacks, nosebleeds, duodenal ulcers and cerebral haemorrhage.

“Although aspirin has been shown to reduce recurrence rates in patients who have undergone surgery for a primary tumour in the colon or rectum, its effects still need to be evaluated in the specific patient group for which it is intended, in this case patients with colorectal cancer that has spread to the liver. We found no clear benefit in this group, while serious adverse events were more common,” said Ernesto Sparrelid, adjunct professor at Karolinska Institutet.

Also read: Why Someone Days Away From Death May Start To See Loved Ones: End-Of-Life Doctor & Neurologist Explain

Aspirin Works In Earlier-Stage Cancer

The new findings contrast with results from the ALASCCA trial, which found that low-dose aspirin reduced colorectal cancer recurrence in patients whose tumours had alterations in genes related to PI3K.

In that trial, the three-year recurrence rate was 7.7% with aspirin versus 14.1% with placebo among patients with specific PIK3CA alterations.

This suggests that aspirin may not be a universal anti-cancer drug. Its benefit may largely depend on the biology of the tumour and how advanced the cancer stage is.

“The anticancer effects of aspirin may depend on the biological and clinical context,” said co-principal investigator Kjetil Taskén of the University of Oslo.

Another possible explanation is that aspirin's anti-inflammatory and anti-platelet effects may interfere with some of the biological processes involved in early tumour growth and recurrence. But once cancer has already spread, particularly to the liver, the biology becomes more complex.

“Aspirin is a well-established, inexpensive and widely available drug, and there is considerable interest in whether it can also reduce the risk of cancer recurrence,” said lead author Sheraz Yaqub of the University of Oslo. “Our findings demonstrate why such treatments must be tested in rigorous randomized trials before being adopted for new patient populations.”

Also read: Trump Says He ‘Psychologically’ Needs To Pop Aspirin Every Day: But Is It Actually Safe?

Trump’s Recent Comments About Aspirin

The findings come just days after President Donald Trump disclosed that he takes aspirin every day, adding that prefers a full-strength tablet.

At an October 3 rally in Ohio, Trump said, “I take an aspirin a day. I don't know if it works, but psychologically I need it.” He also said doctors had wanted him to switch to a lower dose, but that he preferred the larger tablet.

Trump's comments have reignited discussion about daily aspirin use, but they should not be interpreted as medical advice.

Aspirin may reduce clot formation, but it can also increase the risk of serious bleeding. The American Heart Association says routine daily aspirin is generally not recommended for healthy adults without cardiovascular disease unless advised by a healthcare professional.

And the new cancer findings add another reason not to assume that taking aspirin routinely will prevent cancer or improve outcomes after a diagnosis.