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 Ebola outbreak caused by the Bundibugyo virus has reached 915 confirmed cases and 210 deaths in the Democratic Republic of the Congo (DRC) and Uganda, according to the Africa Centers for Disease Control and Prevention (Africa CDC).

The situation remains serious, with ongoing transmission reported in eastern DRC. Ituri Province continues to be the epicentre of the outbreak, accounting for the majority of confirmed cases in the country. The most affected health zones include Bunia, Mongbwalu, and Rwampara.

North Kivu has reported fewer cases than Ituri but has recorded a higher case-fatality rate, particularly in Katwa and Beni. Health officials say this underscores the need for early detection, safe referrals, quality clinical care, and strengthened infection prevention and control measures.

In Uganda, 19 confirmed cases and two deaths have been reported to date. No new cases have been recorded since June 5, 2026.

Community Mistrust Hindering Response Efforts

Africa CDC has identified several challenges hampering response efforts, including gaps in

• contact tracing,
• shortages of personal protective equipment (PPE)
• essential medical supplies,
• limited ambulance capacity,
• community concerns surrounding isolation,
• post-mortem testing,
• household decontamination.

"Communities are central to stopping this outbreak. The response will only succeed if people trust the information they receive, know where to seek care, and feel that response teams are working with them," Africa CDC said in a statement.

Also read: US FDA Panel Recommends First-Ever mRNA Flu Shot For Older Adults: All About The Moderna Vaccine

WHO Warns Outbreak Is Spreading Rapidly

Meanwhile, the World Health Organization (WHO) had warned that the outbreak is spreading rapidly, even as response measures are being intensified.

"The outbreak remains serious and is evolving very fast. However, I have seen a response that is growing stronger every day," said Marie-Roseline Belizaire, WHO Regional Emergencies Director for Africa, speaking to reporters in Bunia, the epicentre of the outbreak.

The WHO estimates that at least 95 per cent of contacts must be traced to effectively contain the outbreak. As per Belizaire, contact tracing has improved to 75 per cent.

Read More: Natural Origin or Lab Leak? Gabbard Reignites COVID Origins Debate, Claims Fauci Funded Wuhan Lab Research

Ebola Outbreak 3 Times Larger

Africa CDC epidemiologist Dr. Wessam Mankoula said the outbreak is approximately three times larger than any previous Ebola outbreak at a similar stage, four weeks after a public health emergency declaration, AP News reported.

Although the outbreak was officially declared on May 15, health officials believe the virus had been circulating undetected for some time beforehand, contributing to its wider spread.

Another major concern is that the outbreak is being driven by the Bundibugyo strain of Ebola virus, for which there are currently no approved antiviral treatments.

Community mistrust of healthcare workers and public health officials, along with reliance on traditional beliefs and healers, is also complicating containment efforts.

The US Food and Drug Administration's independent advisory panel has recommended approval of Moderna's mRNA-based influenza vaccine for older adults.

The panel backed the vaccine, known as mFLUSIVA, for adults aged 50 years and older, concluding that its benefits outweigh its risks.

If ultimately approved by the FDA, mFLUSIVA would become the world's first messenger RNA (mRNA) vaccine for seasonal influenza. The development could provide a new tool against a disease that causes an estimated 15 million to 60 million illnesses, 180,000 to 700,000 hospitalizations, and 17,000 to 75,000 deaths annually in the United States, according to data from the US Centers for Disease Control and Prevention (CDC).

What Did The FDA Advisory Panel Decide?

The recommendation came from the Vaccines and Related Biological Products Advisory Committee (VRBPAC), which reviews vaccine applications and advises the FDA.

The meeting marked the committee's first review of a new vaccine application since 2023 and could lead to the first vaccine approval under the second Trump administration.

In a unanimous vote, all nine panel members supported the use of Moderna's mFLUSIVA vaccine for adults aged 50 to 64 years, as well as for those aged 65 years and older—the age group that had previously raised regulatory concerns.

Also read: No Women Aged 20-24 Died of Cervical Cancer in England Over Five Years, Thanks to HPV Vaccine

However, before the vaccine can be made available for the upcoming flu season, it must receive formal FDA approval and be recommended by the CDC's Advisory Committee on Immunization Practices (ACIP). The CDC advisory panel has not recently convened due to ongoing legal and administrative challenges. An FDA decision on the vaccine is expected by August 5.

How Effective Is Moderna's mRNA Flu Vaccine?

According to Moderna, the vaccine outperformed standard-dose flu vaccines in adults aged 50 to 64 years.

In a large clinical trial involving approximately 40,000 adults aged 50 years and older, Moderna's mRNA vaccine reduced influenza cases by about 27% compared with another routinely used flu vaccine.

The company also conducted a smaller study among adults aged 65 years and older. The results showed that mFLUSIVA generated a strong immune response compared with a high-dose influenza vaccine already recommended for seniors.

FDA adviser Dr. Anna Durbin of Johns Hopkins University described the immune-response data as "very compelling," adding that "the vaccine looks very promising," AP News reported.

How Does The Vaccine Work?

Read More: Sickle Cell Disease: Why India Must Add Curative Treatment to Meet Its 2047 Elimination Goal

Like Moderna's COVID-19 vaccines, mFLUSIVA uses messenger RNA technology. Rather than introducing a weakened or inactivated virus, mRNA vaccines deliver genetic instructions that help the body's cells produce proteins that trigger an immune response. This approach allows vaccines to be updated more quickly and may improve protection against evolving viruses.

Is The Vaccine Safe?

Moderna's data showed no major safety concerns.

The most commonly reported side effects included:

• Injection-site pain
• Fever
• Headache
• Fatigue
• Muscle aches

These reactions were generally temporary and are commonly seen with many vaccines. However, they occurred somewhat more frequently than with currently available flu vaccines. FDA reviewers noted that this is typical of mRNA-based vaccines.

What's Next?

If approved, Moderna plans to conduct a large post-approval study involving approximately 400,000 adults aged 65 years and older.

Half of the participants will receive the mRNA vaccine, while the other half will receive one of the currently recommended flu vaccines for seniors. The study is expected to continue across two influenza seasons.

A Moderna executive said the company hopes to make the vaccine available to patients in time for the upcoming flu season, Reuters reported.

Indian President Droupadi Murmu, on the occasion of World Sickle Cell Day 2026, today expressed confidence that the country can eradicate sickle cell disease well before the 2047 target.

Addressing the International Sickle Cell Day commemoration at Omkareshwar, Madhya Pradesh, President Murmu noted that the National Sickle Cell Anaemia Elimination Mission, launched in 2023, has so far "screened seven crore people, ranging from newborns to those up to 40 years of age."

Calling it "one of the largest initiatives for genetic disease screening in the world," she added that the mission has detected sickle cell disease "in approximately 2.5 lakh people so far, and over 20 lakh carriers of the disease have also been identified."

"Through the collective strength and active engagement of all states, we will succeed in achieving our national goal of eradicating sickle cell-related diseases from the country well before the year 2047," the President said.

The President highlighted three key dimensions of the mission:

• Spreading large-scale awareness and providing pre-marital genetic counselling;
• Identifying the disease in a timely manner through comprehensive screening; and
• Ensuring continuity of care while guaranteeing a holistic approach to management.

She also stressed the need for collective efforts to raise awareness and eliminate the genetic blood disorder, particularly among tribal communities.

Also read: Sickle Cell Disease: Why India Must Add Curative Treatment to Meet Its 2047 Elimination Goal

What Is Sickle Cell Disease?

Sickle cell disease is an inherited blood disorder that affects the shape and function of red blood cells. Instead of being round and flexible, the red blood cells become sickle- or crescent-shaped, making it difficult for them to move smoothly through blood vessels.

The chronic single-gene disorder causes a debilitating systemic syndrome characterized by chronic anemia, acute painful episodes, organ infarction, chronic organ damage, and a significant reduction in life expectancy.

"Sickle cell disease (SCD) is one of India’s most pressing inherited blood disorders, with an estimated 1 in 86 births among tribal and disadvantaged groups affected," Dr Manisha Madkaikar is Director - ICMR-National Institute for Research on Blood and Immune Disorders – Mumbai, told HealthandMe.

Children living with the condition often experience repeated hospital visits, missed school days and limitations in daily activities. Parents frequently face emotional distress, financial strain and the challenge of managing a lifelong medical condition.

What Is the National Sickle Cell Anaemia Elimination Program?

Read More:No Women Aged 20-24 Died of Cervical Cancer in England Over Five Years, Thanks to HPV Vaccine

The National Sickle Cell Anaemia Elimination Program, introduced in the Union Budget 2023, focuses on addressing the significant health challenges posed by sickle cell disease, particularly among tribal populations in the country.

Implemented across 17 high-focus states, the programme aims to improve care and outcomes for sickle cell disease patients while reducing the prevalence of the disorder. The states are Gujarat, Maharashtra, Rajasthan, Madhya Pradesh, Jharkhand, Chhattisgarh, West Bengal, Odisha, Tamil Nadu, Telangana, Andhra Pradesh, Karnataka, Assam, Uttar Pradesh, Kerala, Bihar, and Uttarakhand.

Implemented in mission mode under the National Health Mission (NHM), the program aims to eliminate sickle cell genetic transmission by 2047.

Over a three-year period from 2023-24 to 2025-26, the program targets screening approximately seven crore people, promoting early diagnosis and intervention on a large scale.