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 currently used breast cancer screening referral criteria at the NHS are missing up to 95% of women under 50 who are at higher risk of developing breast cancer in the next decade, according to a new study.

Published in the British Journal of Cancer, the study found that a more comprehensive, personalized risk assessment could identify 8 times as many women at risk as the current NICE guidelines.

Current Screening Criteria

In England, women at higher risk of breast cancer are typically identified after being referred by their GP based on family history, following criteria set by the National Institute for Health and Care Excellence (NICE), under the NHS.

The researchers from the University of Cambridge and The Institute of Cancer Research, London, analyzed data from 1,258 women under the age of 50.

They found that the criteria would refer only 1.4% of women for specialist assessment and identify just 4.4% of women who went on to develop breast cancer within the next 10 years.

Why Personalized Assessment Is Better?

The researchers then evaluated BOADICEA, a multifactorial risk model that combines:

• Family history
• Lifestyle factors
• Reproductive history
• Genetic information

Using this model, 26.5% of women were classified as having above-average risk and referred for further assessment. This approach identified 34.8% of women who developed breast cancer within the following 10 years—around eight times more than the current NICE criteria.

One major reason for the gap is that 73% of women under 50 who developed breast cancer had no family history of the disease, making them unlikely to qualify for referral under existing guidelines.

"We need to get better at identifying women at highest risk of breast cancer so that we can intervene early, when there are more options for treating, or even preventing, their disease," said Dr Juliet Usher-Smith from the Department of Public Health and Primary Care at the University of Cambridge.

Proactive Screening Matters

A second study by the same research team found strong public support for proactive breast cancer risk assessments for women aged 30 to 49, instead of relying on women to seek GP referrals because of family history.

They found that women preferred:

• Proactive invitations for risk assessment
• Comprehensive risk models such as BOADICEA
• Genetic testing where appropriate
• Assessing all women rather than only those with a family history

Dr Sowmiya Moorthie, Senior Strategic Evidence Manager at Cancer Research UK, said broader risk assessment could help more women receive personalized care. However, she noted that further research is needed to understand the impact on NHS staffing, equipment, and patient experience, while ensuring any new approach remains accessible and equitable.

She also emphasized that maintaining a healthy weight, limiting alcohol intake, and seeking medical advice for any unusual breast changes remain important ways to reduce risk and improve outcomes through early diagnosis.

Global Breast Cancer Burden

Breast cancer is the most common cancer worldwide, with steady increases in incidence over the last few decades. It accounts for around one in four cases of cancer and 15 per cent of cancer deaths in women, and is one of the leading causes of death in women under 50.

Breast cancer is the most common cancer in the UK, with around 59,400 new cases diagnosed annually and roughly 11,200 deaths each year. About one in seven women in the UK develops the disease in their lifetime, though survival rates are high, with nearly 90% surviving for five years or more.

Health officials in New York have reported at least three suspected cases of tularemia, a rare bacterial illness also known as rabbit fever.

The disease can spread through the bite of infected ticks or deer flies, or through contact with infected animals, particularly rabbits and rodents.

The Suffolk County Department of Health said laboratory testing is required to confirm the suspected cases, a process that may take several weeks.

"Confirmation of a tularemia diagnosis requires a combination of laboratory testing and fulfillment of specific clinical or epidemiologic criteria," the department told ABC 7, New York.

"The laboratory testing to confirm a tularemia diagnosis may take several weeks."

Tularemia Cases in the US

Tularemia is most commonly reported between May and September, according to the US Centers for Disease Control and Prevention (CDC).

Fewer than 200 cases are reported annually in the US, based on CDC data from 2019 to 2023. Although still rare, reported cases have been increasing.

In Suffolk County, Long Island:

• 4 cases were reported in 2024
• 3 cases in 2023
• 1 case in 2022

What Is Tularemia?

Tularemia is a rare but potentially serious bacterial infection caused by Francisella tularensis, according to the CDC.

The disease can affect the skin, lymph nodes, eyes, throat, lungs, and other organs depending on how the bacteria enter the body.

Rabbit Fever: How Do Humans Get Infected?

People can become infected through:

• Bites from infected ticks and deer flies
• Direct contact with infected rabbits, hares, rodents, or other animals
• Handling infected animal carcasses
• Inhaling contaminated dust, such as while mowing over dead infected animals
• Eating contaminated food
• Getting contaminated water or animal fluids into the eyes.

According to the CDC, the case fatality rate is typically below 2%, though it can be higher depending on the bacterial strain and type of illness.

Types of Tularemia

There are six main forms of tularemia:

• Ulceroglandular tularemia: The most common type; causes a skin ulcer and swollen lymph nodes after a tick bite or contact with an infected animal.
• Glandular tularemia: Causes swollen lymph nodes without a skin ulcer.
• Oculoglandular tularemia: Occurs when contaminated material enters the eyes.
• Oropharyngeal tularemia: Results from eating contaminated food or water, causing sore throat and digestive symptoms.
• Pneumonic tularemia: Affects the lungs and can resemble pneumonia.
• Typhoidal tularemia: A severe form that causes high fever and widespread illness.

Symptoms

Symptoms vary depending on the type of infection but commonly include:

• High fever
• Skin ulcer or open sore
• Swollen, painful lymph nodes
• Watery or irritated eyes
• Sore throat
• Cough
• Muscle aches
• Loss of appetite
• Vomiting or diarrhea

Because tularemia is rare, it can be difficult to diagnose, and its symptoms often resemble more common illnesses.

Treatment

Tularemia is highly treatable with antibiotics when diagnosed promptly.

The CDC noted that a vaccine previously used to protect laboratory workers is currently under review by the US Food and Drug Administration and is not generally available.

How to Prevent Tularemia

The CDC recommends the following precautions:

• Use EPA-registered insect repellents containing DEET, picaridin, IR3535, Oil of Lemon Eucalyptus (OLE), PMD, or 2-undecanone.
• Wear long sleeves, long pants, and long socks in areas where ticks and deer flies are common.
• Remove attached ticks promptly.
• Avoid mowing over sick or dead animals.
• Wear gloves when hunting, trapping, or skinning wild animals.
• Cook game meat thoroughly before eating.

The Philippines has launched a fresh measles-rubella vaccination campaign in Eastern Visayas, aiming to vaccinate more than 445,000 children aged six to 59 months.

The intensified Measles-Rubella Supplemental Immunization Activity (MR-SIA) will run from August 10 to 28, with support from local governments, schools, community health workers and barangay officials.

The campaign comes as the country continues to recover from years of declining routine childhood immunisation, which left thousands of children at risk to vaccine-preventable diseases.

"Knowing that our past accomplishments in the country are not that high, the Department of Health decided to have an additional layer of protection for our children by coming up with the Measles-Rubella Immunization Activity," said Dr Exuperia Sabalberino, Regional Director of the Department of Health Eastern Visayas Center for Health Development.

According to the Department of Health (DOH), Leyte accounts for the largest target population, with more than 152,000 eligible children, while Biliran has the smallest.

Children under five years of age will be offered the vaccine regardless of their previous vaccination status if they fall within the campaign's eligibility criteria.

About The Campaign

Health authorities have been race to close immunity gaps and prevent new outbreaks of the highly contagious disease.

The latest push follows concerns over low routine immunisation coverage in several Philippine regions. During the 2023 MR-SIA campaign, Eastern Visayas achieved only 72.6% vaccination coverage, well below the level needed to maintain herd immunity.

Health officials warn that insufficient coverage increases the risk of measles and rubella outbreaks. "Vaccination is an extra layer of protection and also prevents outbreaks, as measles and rubella are highly contagious because one confirmed case can affect 12 to 18 people, especially those who are vulnerable and immunocompromised," said Chiradee R. Claridad, DOH-8 National Immunization Program Coordinator.

Also read: US Measles Cases Reach 2,371; RFK Jr Takes U-Turn, Urges Families to Vaccinate Kids

Measles Remains A Global Concern

Measles is among the world's most infectious viral diseases, spreading through respiratory droplets when an infected person coughs or sneezes.

It can lead to serious complications including pneumonia, brain inflammation, blindness and death, particularly in young children. Rubella is generally milder but can cause severe birth defects if a pregnant woman becomes infected.

The Philippines has experienced several major measles outbreaks in recent years, including the nationwide resurgence in 2019 and the Bangsamoro outbreak in 2024, both linked to poor vaccination coverage.

The Philippines has already made progress in recent months. Last month, the DOH announced that over one million children in Metro Manila had been vaccinated, achieving 87.1% coverage under the measles-rubella campaign.

The latest campaign also comes after measles gained global attention after several countries, including the United States and parts of Europe, reported outbreaks this year driven by falling childhood vaccination rates.

The United States has reported 2,371 in 2026m according to the latest data from the Centers for Disease Control and Prevention (CDC). Among these cases:

• 20% of cases are in children under 5; 49% are in those 5–19 years.
• 7% of patients have been hospitalized, compared with 11% in 2025.
• No deaths have been reported.
• 93% of cases are in people who are unvaccinated or have unknown vaccination status.