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 Centers for Disease Control and Prevention (CDC) has issued an immediate recall of contaminated Rosabella brand moringa powder capsules that are tied to an outbreak of drug-resistant Salmonella infections, causing fever, diarrhea (which may be bloody), nausea, vomiting, and abdominal pain.

This is the second Salmonella outbreak related to moringa powder in the past six months. However, the two cases are not related, the CDC said.

In its latest alert issued in February 2026, the CDC reported seven cases, including three hospitalizations, from seven states linked to Rosabella brand moringa powder capsules.

The agency noted that the capsules distributed by Ambrosia Brands LLC, which is based in the US, are contaminated with Salmonella Newport and have led to one case each in states including Arizona, Florida, Iowa, Illinois, Indiana, Tennessee, and Washington.

"CDC, public health and regulatory officials in several states, and the US Food and Drug Administration (FDA) are collecting different types of data to investigate a multistate outbreak of multidrug-resistant Salmonella Newport infections,” the CDC said.

"Epidemiologic data show that Rosabella brand moringa powder capsules may be contaminated with Salmonella Newport and may be making people sick,” it added.

What The CDC Investigation Found

The median age of the affected patients is 66 years, and 86 percent are females.

The public health officials also conducted a whole-genome sequencing of the seven samples.

The tests revealed that the Salmonella strain associated with this outbreak is resistant to all first-line and alternative antibiotics commonly recommended for the treatment of Salmonella infections.

"This strain also might be resistant to multiple β-lactam antibiotics, including meropenem and other carbapenems, because it carries an NDM-1 carbapenemase gene," the CDC said.

As Salmonella illnesses may not be treatable with commonly recommended antibiotics, the CDC advised to "tailor antibiotic treatment to antimicrobial susceptibility testing results when possible".

Issuing a recall, the CDC stated the capsules are sold on the company's website, Amazon, TikTok Shop, Shein, and eBay.

"If you have any of these capsules in your home, throw them out or return them. CDC and FDA continue to work to identify if there are other products causing illness in this outbreak,” the regulator said.

In January, the regulator had reported an investigation of a Salmonella outbreak linked to dietary supplements containing moringa leaf powder.

What Is The Salmonella Infection?

Food contamination with Salmonella -- an organism -- can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems.

The CDC noted that in rare cases, the organism can get into the bloodstream and produce more severe illnesses such as arterial infections (i.e., infected aneurysms), endocarditis, and arthritis.

Salmonella Newport, detected in the recent outbreak, is a serious, often multidrug-resistant (MDR) bacterium causing human and animal illnesses. It also ranks among the top three Salmonella serotypes in US foodborne outbreaks.

Noida administration has launched a 10-day measles-rubella (MMR) vaccination drive with an aim to cover students from Classes 1 to 5 across government and private schools. UP State Health Department officials noted that the sessions are also being conducted within the school premises under this campaign to ensure a wider vaccination coverage and ease of access for students and parents.

The initiative is part of the state government's ongoing efforts to strengthen immunity against measles and rubella. It is a highly contagious viral disease that primarily affects children.

Under the Measles-Rubella elimination campaign, the Central government aims to reach 100 per cent immunization coverage by ensuring children receive both doses of the vaccine. According to the 2024–25 Health Management Information System, India’s MMR coverage is currently 93.7 per cent for the first dose and 92.2 per cent for the second.

“The objective is to ensure that no eligible child is left out. Children will be administered an additional dose of the MR vaccine during the campaign. The vaccine is safe and is being provided for free of cost,” Dr Narendra Kumar, Chief Medical Officer of Gautam Buddha Nagar, told the media persons.

What Is Measles?

Measles is a highly contagious disease. It spreads by coughs or sneezes or by touching things that someone with measles has coughed or sneezed on.

Measles, also known as rubeola, is an extremely contagious viral illness that typically causes high fever, cough, runny nose, red and watery eyes, and a characteristic rash that begins on the face and spreads downward across the body. It spreads through respiratory droplets and can lead to severe and sometimes fatal complications, including pneumonia and inflammation of the brain known as encephalitis.

Symptoms include high fever, sore or red and watery eyes, coughing, sneezing, and small white spots in the mouth.

What Are The Symptoms Of Measles

Measles has a high transmissibility, and high measles immunity levels are required to prevent sustained measles virus transmission.

This is why herd immunity for measles could be easily breached.

It easily spreads from one infected person to another through breathes, coughs or sneezes and could cause severe disease, complications, and even death.

Symptoms include:

• High fever
• Cough
• Runny Nose
• Rash all over the body

The most unique symptom or the early sign of measles in the Koplik spots. These are tiny white dots that look like grains of salt on red gums inside the cheeks that appear before the red rash starts to appear on a person's face and then the body.

Read: Measles Outbreak In UK: Virus Spreads Among Unvaccinated Children In London

Furthermore, the symptoms of measles are also characterized by the three Cs:

• Cough
• Coryza or runny nose
• Conjunctivitis or red and water eyes

How Long Does The Infection Last?

The progression of the symptom comes in two stages, first is the prodromal stage or Days 1 to 4, where one would notice high fever, cough, runny nose, red and watery eyes, sore throat, fatigue, and Koplik spots.

The second stage is called the rash stage or the days 5 to 10 or even more where rash start to appear on the hairline, and then it runs down the body. It lasts for several days and fades in the same order.

The first symptoms, notes the Centers for Disease Control and Prevention (CDC), appear 7 to 14 days after a measles infection. Often, it could also lead to ear infection, or even diarrhea. Though these complications happen in every 1 in 10 children or individual with measles.

The US Food and Drug Administration (FDA) has issued new guidance urging veterinary drug makers to define the duration of antibiotic use in livestock.

The February 2026 guidance, published by the FDA’s Center for Veterinary Medicine (CVM), aims to mitigate the development of antimicrobial resistance and protect public health. It is consistent with previous recommendations by the federal agency that promoted the judicious use of medically important antimicrobial drugs in animals.

The FDA said that the guidance is intended for sponsors of approved new animal drug applications (NADAs) and abbreviated new animal drug applications (ANADAs) containing antimicrobial drugs.

The guidance provides recommendations on how to add duration limits to medically important antibiotics used in or on the medicated feed of food-producing animals.

"The framework outlined in this guidance is intended to facilitate voluntary changes to have all medically important antimicrobial new animal drugs administered in alignment with the principles of judicious use,” the FDA said.

"This guidance provides specific recommendations on how sponsors may facilitate changes to the approved conditions of use of affected products in support of ongoing efforts to mitigate the development of antimicrobial resistance,” it added.

The New FDA Recommendations

Currently, no limit has been set for the approved treatment in food-producing animals. As a result, farmers can use the antibiotics in animal feed for extended periods of time.

The proposed guidelines for “appropriately defined duration of use” labelling will ensure that the drug is used only when animals need it.

The regulator also called the industry to “revise the labeling to include appropriate criteria regarding when to begin and end feeding of the antimicrobial drug.”

The nonbinding guidance also suggests sponsors avoid instructions like “feed until market weight” to define the duration of use.

"The scope of this guidance is limited to those drugs that are approved for use in or on animal feed because all the approved uses of medically important antimicrobial drugs in other (non-feed) dosage forms already have appropriately defined durations of use," the FDA said.

Why Misuse of Antibiotics In Animals Is A Concern

Antibiotic use in livestock and poultry globally is intended to treat, control, and prevent bacterial infections.

However, their overuse and misuse in food-animal production threaten both animal and human health. It is because these promote the emergence and spread of antimicrobial resistance (AMR).

AMR in livestock is a major driver of the 700,000 to over 1 million annual human deaths linked to drug-resistant infections globally.

With roughly 70 per cent of global antibiotics used in agriculture, this misuse contributes to food-borne resistant pathogens and is projected to drive up to 10 million annual human deaths by 2050, as per the World Organisation for Animal Health.

FDA On Antibiotic Use In Livestock

The 2017 guidance issued by the FDA limited the over-the-counter use of medically important antibiotics on livestock.

It also required a prescription and veterinary oversight for all antibiotic use.

Later in 2018, the CVM called for all antibiotics used in the feed and drinking water of food -producing animals to have “an appropriately targeted duration of use”.