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.

"We just saw it, and everyone is freaking out," told one scientists to the Washington Post on account of anonymity on seeing the Centers for Disease Control and Prevention (CDC) update its website backpedaling on the link between vaccines and autism. The said link had long been debunked, however, the Health Secretary Robert F Kennedy Jr. has echoed the thought, and has a long history of critiquing vaccines and linking it to autism.

The agency's website was updated on Thursday and under Autism and Vaccine, it notes: 'The claim "vaccines do not cause autism" is not an evidence-based claim because studies have not ruled out the possibility that infant vaccine cause autism.'

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The first header reads: 'Vaccine do not cause autism', the reason the header has not been removed is all thanks to an agreement with the chair of the US Senate Health, Education, Labor, and Pension Committee that it would remain on the CDC website, as per the website.

As the Post reported, the scientists did not have any prior information about the changes to the website, neither were they consulted for it. Before the Wednesday update, the CDC website stated that studies have shown that there is "no link" between vaccines and developing autism in infants. The website previously stated that "no links" have been found between any vaccine ingredients and disorders.

Read: CDC Plans Vaccine-Autism Study Despite Scientific Consensus

The CDC's Claim: Autism and Vaccine Link

As per the CDC website, approximately 1 in 2 surveyed parents of autistic children believe vaccines played a role in their child's autism. For this, the CDC cites a 2006 survey published in the Journal of Developmental and Behavioral Pediatrics. The CDC notes that these vaccines are often those that the child receives in the first six months of life, including Diphtheria, tetanus, pertussis (DTaP), Hepatitis B (HepB), Haemophilus influenzae type B (Hib), Poliovirus, inactivated (IPV), and Pneumococcal conjugate (PCV) and one given at or after the first year of life (Measles, mumps, rubella (MMR)).

According to CDC a timeline has been provided that shows the correlation between the prevalence in autism cases and higher doses of the above mentioned vaccines. In 1986, the CDC recommended five infant vaccine doses: two oral polio (OPV) doses and three DTP injections. By 2025, the schedule expanded to include multiple doses of rotavirus, HepB, DTaP, Hib, PCV, IPV, influenza, and, at 12 months, MMR, varicella, and HepA.

Autism rates have risen since the 1980s, and while this trend coincides with an increase in recommended childhood vaccines, correlation alone does not establish causation. Autism is believed to have multiple contributing factors, and some researchers have examined possible environmental links. One study reported a statistical correlation between aluminum adjuvants and autism prevalence.

Read: Fact Check: Does Aluminum In Vaccines Cause Food Allergies As RFK Jr Claims?

While the CDC notes that correlation does not prove causation it also mentions that "it does merit further study".

What Are The Scientists Saying?

“CDC cannot currently be trusted as a scientific voice,” said Demetre Daskalakis, who formerly led the agency’s center responsible for respiratory viruses and immunizations. He resigned in August. “My question is, how language that misrepresents decades of research ended up on a CDC website,” said Debra Houry, the CDC’s former chief medical officer who also resigned in August.

However, the spokesman for the Department of Health and Human Services that oversees the CDC, Andrew Nixon, said, "We are updating the CDC’s website to reflect gold standard, evidence-based science.”

The Origin Of This Vaccine-Autism Theory

This originated from now debunked 1998 study, which was retracted after its author, Andrew Wakefield, was found guilty of professional misconduct and barred from practicing medicine in the UK. Despite decades or research no such link could be proven, however, the claim still continues in the political and public discourse.

Kennedy, who had long been anti-vaxxer, also made numerous claims, even though studies have long debunked this theory.

Many years of extensive study has shown that there is no real connection between vaccines and autism. As per a 2019 study, which was conducted over a decade in Denmark, involving half a million children, confirmed that the measles, mumps and rubella (MMR) vaccine does not increase any risk of autism. Other studies too have confirmed the same, being studied over large sample sizes. It had reinforced the medical consensus that vaccines are safe and essential for public health.

Los Angeles County has recorded its first flu-related death of the season, the LA County Department of Public Health announced Wednesday.

The individual was an “older adult” with pre-existing health conditions. Officials noted that the person had likely not received a flu vaccine for this season, which generally spans from October through May.

Although flu cases are still low in November, health authorities expect the number of infections to rise as holiday travel and indoor gatherings increase.

First Flu Death In LA County

"The LA County Department of Public Health reported Wednesday the first flu-related death of the season in Los Angeles County. “We extend our condolences to the family and loved ones of the deceased. This sad loss underscores the serious risks posed by influenza,” said Dr. Muntu Davis, Los Angeles County health officer, in a news release.

Flu activity remains low for now, but it is anticipated to climb around Thanksgiving and the broader holiday period, when travel and indoor events are more common.

Experts advise getting vaccinated at least two weeks before holiday travel or gatherings, since it takes time for immunity to develop.

They also recommend wearing a properly fitted mask in crowded indoor settings, particularly for households with older adults, children under five, or pregnant women.

Flu Shot Guidelines and Eligibility

The Centers for Disease Control and Prevention (CDC) recommends that everyone aged six months and older receive an annual influenza vaccine, with rare exceptions for specific medical conditions. Annual vaccination is especially important for high-risk groups, including:

• Older adults, particularly those aged 65 and above
• Young children under five, especially under two years
• Pregnant individuals
• People with chronic medical conditions such as asthma, diabetes, or heart disease
• Residents of long-term care facilities

Timing: The ideal time to get a flu shot is before flu activity peaks, usually in early fall. It takes about two weeks after vaccination for the body to build full immunity, so getting vaccinated before holiday travel and gatherings is crucial.

Flu Shot: Types of Vaccines

Several flu vaccines are available, including standard-dose, high-dose for older adults, and nasal spray options for certain age groups. Your healthcare provider can recommend the most appropriate option based on age, health status, and any contraindications.

Flu vaccines are generally safe. Mild side effects like soreness at the injection site, low-grade fever, or fatigue may occur, but serious reactions are extremely rare. Individuals with severe allergies to vaccine components should consult their healthcare provider before vaccination.

Even after vaccination, preventive measures such as frequent handwashing, wearing masks in crowded indoor spaces, and avoiding contact with sick individuals can help reduce flu transmission.

The U.S. Centers for Disease Control and Prevention is promoting a long-debunked theory, suggesting a potential link between vaccines and autism, and claiming that studies supporting this connection “have been ignored by health authorities.”

CDC Pushes Controversial Vaccine-Autism Theory

The disputed theory appeared on a revised section of the CDC’s website under “Autism and Vaccines” on Wednesday. The website now states: “The statement ‘Vaccines do not cause autism’ is not an evidence-based claim. Scientific studies have not ruled out the possibility that infant vaccines contribute to the development of autism.

Also Read: After Lancet Links Ultra-Processed Foods to Organ Damage, New Study Ties Them to Bowel Polyps in Women Under 50

However, this statement has historically been shared by the CDC and other federal health agencies within HHS to prevent vaccine hesitancy.” The agency added that the U.S. Department of Health and Human Services has “launched a thorough review of the causes of autism, including investigations on plausible biological mechanisms and potential causal links.”

It also noted, “This webpage will be updated with gold-standard science.” Prior to Wednesday, the page stated there is “no link” between vaccines and autism, and no vaccine ingredients were connected to the condition, according to archived versions cited by The Washington Post.

CDC Faces Criticism

Another part of the site, “About Vaccines for Your Children,” last updated in August 2024, still asserts, “Scientific studies and reviews continue to show no relationship between vaccines and autism.” Dr. Demetre Daskalakis, a former CDC official who resigned earlier this year as head of the National Center for Immunization and Respiratory Diseases, criticized the changes, saying on X, “The weaponization of the voice of CDC is getting worse. DO NOT TRUST THIS AGENCY. This is a national embarrassment.” Despite the new language, the header “Vaccines do not cause autism” remains due to an agreement with Sen. Bill Cassidy (R-La.), chair of the Senate Health Committee, who cast the deciding vote to advance Health Secretary Robert F. Kennedy Jr.’s nomination to the full Senate floor.

CDC Staff Shocked

The revisions surprised CDC staff, including those overseeing vaccine safety and autism information, leaving them blindsided, according to The Post. “We just saw it, and everyone is freaking out,” one scientist said, as per NBC News.

While the changes could undermine public confidence in vaccines, Kennedy and Trump have historically supported this theory. Both have also warned against Tylenol use during pregnancy, claiming a link to autism, despite large-scale studies disproving any connection.

What Is The Vaccine And Autism Link About?

Autism spectrum disorder, or autism, is a condition that affects the brain, making it challenging for some people to communicate and interact with others. Experts still don’t fully understand what causes it.

The idea that vaccines might play a role largely began with a 1998 study suggesting that the MMR (measles-mumps-rubella) vaccine—or infection with the natural measles virus—could lead to autism. Since then, numerous scientific studies have shown there is no connection between vaccines or any of their ingredients and autism.

The 1998 study itself was later discredited: the research was found to be false, the doctor responsible lost his medical license, and the journal that published the paper retracted it, acknowledging it should never have been published.

Despite strong evidence showing vaccines are safe and effective, some parents still choose to delay or skip vaccinations for their children. This can be very dangerous, as diseases like measles, which vaccines prevent, are still circulating. An unvaccinated child who contracts one of these illnesses can become seriously ill or even die and may also put others at risk.

While mild reactions like a fever or rash can occur after vaccination, the chance of a serious side effect from the MMR or other recommended vaccines is very small compared to the risks of the diseases they protect against.