Smokers who make the decision to quit will experience immediate health benefits, including a rapid reduction in their risk of atrial fibrillation (A-Fib), according to new research published in JACC: Clinical Electrophysiology. The study, conducted by Dr. Gregory Marcus, a cardiologist at the University of California, San Francisco, offers compelling evidence for smokers to quit, showing that it’s never too late to avoid the damaging effects of smoking on heart health.

Dr. Marcus, the senior author of the study, emphasized that A-Fib can be prevented even in individuals who have smoked for years. "The findings provide a compelling new reason to show current smokers that it’s not too late to quit, and that having smoked in the past doesn’t mean you’re ‘destined’ to develop A-Fib," Marcus explained. "Even for the current and longtime smoker, A-Fib can still be avoided."

What is Atrial Fibrillation (A-Fib)?

"There’s strong evidence that smoking increases the risk of A-Fib," Marcus said. "But the benefits of quitting smoking have been less certain." With this in mind, his team sought to determine whether quitting could significantly lower a person’s risk of developing A-Fib, or if the risk would remain the same.

The research team analyzed data from over 146,700 current and former smokers, tracking their smoking habits and health over a 12-year period using data from the UK Biobank database. The results were promising: former smokers had a 13% lower risk of developing A-Fib compared to current smokers, while those who quit during the study saw an 18% reduction in their risk.

"This is likely a testament to the potency of reducing atrial fibrillation risk pretty shortly after quitting," Marcus said in a statement from the American College of Cardiology.

The findings highlight the importance of quitting smoking, not only for general health but specifically for reducing the risk of serious heart conditions like A-Fib.

Tips for Quitting Smoking

Quitting smoking is one of the most effective ways to lower the risk of A-Fib and improve overall heart health. While it can be challenging, the benefits of quitting are clear and immediate. Here are some tips to help you quit smoking successfully:

1. Choose a specific date to quit smoking and stick to it. Prepare yourself mentally and physically for this change.

2. Reach out to family, friends, or a support group to help keep you accountable. Sharing your goals with others can provide encouragement.

3. Options like nicotine patches, gum, or lozenges can help ease withdrawal symptoms and reduce cravings.

4. Identify situations that make you want to smoke, such as stress or social gatherings, and find healthy ways to cope with them.

5. Regular exercise can help distract you from cravings and improve your mood during the quitting process.

6. Drinking water can help flush nicotine out of your system faster, reducing cravings.

7. Activities like yoga, meditation, or deep breathing exercises can help manage stress, a common trigger for smoking.

Quitting smoking offers immediate and significant benefits, particularly in reducing the risk of atrial fibrillation. The latest research provides smokers with more motivation to quit, showing that it's never too late to take control of their heart health.

The NHS in England today announced that 100 pharmacies will offer free cholesterol check-ups beginning this autumn.

The initiative is part of an NHS drive to reduce heart disease and stroke deaths by a quarter over the next decade. It will include free finger-prick blood tests for cholesterol on the high street for the first time.

Who Is Eligible?

People aged 40 to 84 who are not pregnant and have not had a blood test in the past year will be eligible to walk in and get tested.

Eligible people will also be offered a blood pressure check as part of a clinical consultation with a pharmacist prescriber.

The NHS pilot will run until spring 2027.

How Will The Test Be Conducted?

Blood will be taken from a person’s fingertip using a lancet — a small, sharp medical tool used to prick the skin — and analyzed immediately. A pharmacist prescriber can then provide lifestyle advice and determine whether any treatment, such as statins, may be needed.

Patients will receive a copy of their results by email. They will also be offered a blood pressure check as part of a clinical consultation with a pharmacist prescriber.

How Will It Help?

The national rollout follows a successful smaller pilot in north London, which tested 2,493 patients at 61 community pharmacies between January 2025 and March 2026.

Nearly one in five patients were found to be suitable for pharmacological intervention, and 88 people started taking statins.

David Webb, the chief pharmaceutical officer for England, said pharmacies could be a vital first line of defense against serious illness.

He said: “By making it easier for people to get a quick and convenient cholesterol health check on their local high street, we can spot ticking timebombs earlier, helping people take action, and prevent heart attacks and strokes before they happen.

“This is the latest in a series of initiatives involving pharmacies in delivering care previously only offered in GP surgeries as part of the 10-year health plan to bring care closer to where people live.”

Will This Be Scaled Up?

In the first phase of the national rollout, about 100 NHS pharmacies across England will begin offering the checks from this autumn.

Dr Rani Khatib, NHS England’s national specialty adviser for cardiovascular disease prevention, said everyone should strive to be aware of the most common risk factors for heart disease, including high cholesterol and blood pressure, and “know their numbers”.

“This initiative will help people manage their risk factors earlier and reduce their risk of having heart attacks or strokes,” he said.

Alison McGovern, a health minister, said it was “exactly the type of innovation” she wanted to see across the NHS.

“We’re making it easier for people to spot potential problems earlier and take action to protect their health,” she said.

“Early detection can help prevent serious conditions such as heart attacks and strokes, helping people stay healthier for longer while reducing pressure on NHS services.”

How Does High Cholesterol Raise Heart Risks?

Too much LDL (“bad”) cholesterol in the blood can build up inside artery walls. Over time, these fatty deposits — called plaque or atheroma — can make arteries narrower and restrict blood flow, according to the NHS.

High cholesterol usually causes no symptoms, which is why testing is important. Cholesterol can be reduced through healthier eating and regular exercise and, for people at sufficient risk, medicines such as statins.

A chemistry lab at the Massachusetts Institute of Technology (MIT) was shut down and subjected to hazardous-material testing after a graduate student revealed that they may have synthesised dimethylmercury, an extremely toxic form of organic mercury.

The student went to an emergency department after reporting the possible exposure. MIT said the student was not authorised to work with dimethylmercury and that the chemical was not part of their research.

Since the incident, Building 18 has been closed for testing and decontamination, while precautionary cleaning has also been carried out in the student's residence hall.

Even though the student remained under medical supervision, MIT later said that the student's initial blood test showed no sign of mercury exposure. So, why did a slight possibility of this chemical trigger such a major response?

What Exactly Is Dimethylmercury?

Unlike some toxic substances that mainly become dangerous when swallowed or inhaled, dimethylmercury can be absorbed through the skin. Its exposure routes include inhalation, ingestion and absorption through skin. Additionally, its ability to pass through protective materials is one reason laboratory safety experts have historically treated it with extreme caution.

The US Occupational Safety and Health Administration says dimethylmercury is “readily absorbed through the skin” and warns that a severe toxic dose can involve less than 0.1 mL of the liquid.

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Even Tiny Amounts Of Dimethylmercury Can Be Extremely Dangerous

The danger comes partly from the molecule's physical and chemical properties. Dimethylmercury is lipid-soluble to break biological barriers and enter the body efficiently. Once absorbed, mercury can ultimately reach the nervous system and cause severe and irreversible neurological damage.

It is also extremely volatile, meaning its exposure is not limited to direct skin contact. It can also generate toxic vapour that one may inhale and get poisoned. Once poisoned, the effects can be deceptive because symptoms may not appear immediately.

That delay can make even a minor exposure especially dangerous as the person may not realise they have been poisoned until significant neurological damage has occurred.

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Mercury Attacks The Nervous System

Dimethylmercury is even more dangerous as it is capable to enter the body efficiently, producing delayed neurological toxicity.

Researchers and safety authorities therefore treat even a slight exposure as an emergency rather than waiting for symptoms to develop.

Historic Mercury Poisoning Case Of 1996

The chemical's notorious reputation was further cemented after the death of Karen Wetterhahn, a chemistry professor at Dartmouth College.

In 1996, Wetterhahn accidentally spilled a very small amount of dimethylmercury onto her gloved hand. At the time, she was wearing latex gloves that were considered adequate laboratory protection. But the chemical penetrated the gloves and was absorbed through her skin.

Months later, she developed neurological symptoms including problems with balance and speech. She was diagnosed with severe mercury poisoning and died in 1997.

The case led laboratories to reconsider how dimethylmercury should be handled and highlighted the inadequacy of ordinary latex gloves against the chemical.

A Virginia doctor last week reported waking up with a bat inside her mouth.

In a now-viral Instagram video, Dr. Krista Edelman, a Richmond gastroenterologist, said she was asleep beside her husband around 6 a.m. on August 20 when she dreamed that a small mouse was trying to get into her mouth.

When she reached up, she realized it was a bat. Edelman safely removed it but immediately sought emergency medical care. She later shared a public health message urging people not to ignore indoor bat encounters.

Recent Bat Encounters Raise Concern

Edelman’s experience is not isolated. With bat activity increasing during the summer, health officials in British Columbia, Canada, and New York have issued warnings about potential rabies exposure.

On August 9, a woman at Olympic National Park in Washington had physical contact with a bat that later tested positive for rabies. Park rangers issued an alert to identify others who may have come into contact with the animal.

On August 30, public health officials in North Carolina issued an emergency neighborhood alert after two Ballantyne residents were confirmed to have had direct exposure to a rabid bat.

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Bat Exposures Are Rising

The increase has been particularly notable in British Columbia. Interior Health data published August 26 showed 430 bat exposures recorded in 2026, compared with 126 in 2024.

In Oregon, 22 rabid bats had been recorded by late July, matching the state’s highest historic baseline since 2000.

Why Bat Encounters While Sleeping Are Risky

The concern goes beyond visible bites or scratches. When a person is asleep, they may not know whether a bat has bitten or scratched them.

An 11-year-old Canadian boy died from rabies after being awoken by a bat on his nose and mouth. The incident occurred during a 2024 family visit to a cottage in Ontario, according to a report published in the Canadian Medical Association Journal in July this year.

The case highlights why a bat found in a bedroom should not be dismissed, even when there is no obvious bite or scratch.

When Rabies Treatment May Be Needed

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According to updated guidelines from the Maine CDC and health departments nationwide, medical evaluation for rabies post-exposure prophylaxis (PEP) may be necessary after:

• A direct bite or scratch.
• Handling a bat without protective gloves.
• Waking up to find a bat flying or resting in the bedroom.
• Finding a bat in a room with an unaccompanied child, pet, or someone who was sleeping or incapacitated and cannot confirm whether contact occurred.
• Bat bites and scratches may not always be visible, making encounters involving sleeping or incapacitated people particularly concerning.

What to Do After Bat Contact

Interior Health advises avoiding contact with bats altogether. Never touch a live or dead bat.

If you are bitten, scratched or otherwise come into contact with a bat, including through clothing, wash the affected area with soap and water for at least 15 minutes and seek medical attention immediately.

Rabies is almost always preventable when post-exposure treatment, including vaccination when indicated, is given promptly.

If a bat is found inside a home, contact the relevant authorities or qualified specialists rather than attempting to remove it yourself.

How to Keep Bats Out

Health authorities recommend checking homes and cottages for potential entry points and sealing them to prevent bats from entering living spaces.

Key precautions include:

• Repairing damaged screens.
• Sealing openings in roofs and walls.
• Checking vents and chimneys.
• Closing other potential entry points.
• Using qualified specialists for safe bat removal.