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 United States is now providing doses of an experimental Ebola treatment developed by Mapp Biopharmaceutical for clinical trials in the Democratic Republic of Congo, where a growing outbreak of the Bundibugyo strain has infected more than 1,000 people and claimed over 250 lives. The decision marks a significant shift from the U.S. government's earlier stance, which limited access to the drug to Americans considered at high risk of exposure.

Health officials are racing to find effective ways to contain the outbreak, as there are currently no approved vaccines or treatments specifically designed for the Bundibugyo strain of Ebola. A small number of cases and deaths have also been reported in neighboring Uganda, raising concerns about the disease spreading further across the region.

The experimental therapy, known as MBP134, was developed by San Diego-based Mapp Biopharmaceutical. While the U.S. had previously kept its stockpile for potential use in exposed American citizens, it is now making doses available to support clinical research in Congo. This is the first time Washington has publicly committed stockpiled supplies of the treatment for a broader international trial.

According to the World Health Organization, researchers will test MBP134 both on its own and alongside the antiviral drug remdesivir, marketed as Veklury. Remdesivir became widely known during the COVID-19 pandemic and is being evaluated to see whether it can improve outcomes when combined with the antibody treatment.

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Ebola Situation In Western Africa

The confirmed cases in the Ebola outbreak in the Democratic Republic of Congo (DRC) have reached the highest total ever recorded during the first month of an outbreak in Africa, according to the World Health Organization (WHO).

As of June 22, confirmed Ebola cases in Congo had risen to 1,094 and deaths to 277, according to the DRC Ministry of Health. The WHO raised concerns about the rapid spread of the deadly virus and the challenges facing containment efforts.

“This is the largest number of confirmed cases in the first month of an Ebola disease outbreak in Africa,” said Dr Abdirahman Mahamud, Director, Health Emergency Alert and Response Operations at WHO, during a press briefing in Geneva.

"What is important is we need to scale up and this outbreak is moving faster than us," he told reporters after returning from Bunia last week.

Mahamud also noted signs of hope, highlighting a quick increase in the number of Ebola beds to over 500 in the past fortnight and signs that community resistance and violent resistance to Ebola responders was beginning to abate.

As of June 24, Uganda had recorded 20 confirmed Ebola cases, including two fatalities. The latest infection was identified on June 21, with no additional cases reported afterward. Of the confirmed infections, 15 were linked to travel from the Democratic Republic of the Congo (DRC), while five resulted from local transmission. Among the nine cases with available location data, eight were detected in Kampala and one in the neighboring Wakiso District.

Chemotherapy is often considered the most challenging aspect of cancer treatment due to its wide range of side effects. However, new advances in targeted therapies may soon reduce the need for conventional chemotherapy for some breast cancer patients.

Two drugs developed by pharmaceutical giants AstraZeneca and Gilead Sciences have shown encouraging results in treating triple-negative breast cancer (TNBC), one of the most aggressive and difficult-to-treat forms of the disease.

Triple-negative breast cancer lacks three key receptors commonly targeted by standard breast cancer therapies, making many conventional treatments ineffective.

In recent weeks, the US Food and Drug Administration (FDA) approved two targeted therapies—Datroway, developed by AstraZeneca in partnership with Daiichi Sankyo, and Trodelvy from Gilead Sciences—as first-line treatment options for certain patients with advanced triple-negative breast cancer.

Why These Drugs Are Better Than Chemo?

Both Datroway and Trodelvy belong to a class of medicines known as antibody-drug conjugates (ADCs). These therapies use antibodies to identify proteins present on most triple-negative breast cancer cells and deliver a potent dose of chemotherapy directly to the tumor.

The approach is designed to minimize damage to healthy tissues compared with traditional chemotherapy, which affects rapidly dividing cells throughout the body. Clinical trials showed that both drugs reduced the risk of disease progression by about 40% compared with standard chemotherapy, Washington Post reported.

“For seven out of 10 patients with metastatic triple-negative breast cancer who are not candidates for immunotherapy, chemotherapy has remained the only treatment option," said Arlene Brothers, Executive Director, Triple Negative Breast Cancer Foundation, in a statement.

The new drugs for the first time, will pave the way "for these patients will have a new standard of care beyond traditional chemotherapy at the outset of their treatment.”

Efficacy of Trodelvy And Datroway

Gilead's approval is based on two clinical trials that evaluated how effectively Trodelvy delayed tumor growth. When used alone, Trodelvy reduced the risk of tumor progression or death by 38% compared with chemotherapy in patients who were not eligible for immunotherapy.

Among patients eligible for immunotherapy—approximately 30% of all triple-negative breast cancer cases—a combination of Trodelvy and Merck's Keytruda reduced the risk of tumor progression or death by 35%.

“For more than twenty years, patients with mTNBC have had limited choices in first-line treatment. Building on its impact in second-line mTNBC, Trodelvy now offers patients a powerful new backbone therapy option in the first-line setting,” said Dietmar Berger, Chief Medical Officer, Gilead Sciences, in a statement.

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In a separate clinical trial, AstraZeneca's Datroway reduced the risk of tumor progression or death by 43% compared with chemotherapy. The drug also extended median progression-free survival by five months.

“Datopotamab deruxtecan (brand name Datroway) is the first and only medicine to significantly prolong overall survival in the 1st-line setting compared to chemotherapy in patients with metastatic triple-negative breast cancer who are not candidates for immunotherapy. This approval will bring a much-needed treatment option for these patients,” said Tiffany A. Traina, Triple-Negative Breast Cancer Clinical Research Program, Memorial Sloan Kettering Cancer Centre, part of the study.

Burden Of Triple-negative Breast Cancer

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Triple-negative breast cancer (TNBC) represents about 10–15% of global breast cancer cases but accounts for a disproportionately high share of mortality. In 2025, more than 48,000 Americans were diagnosed with triple-negative breast cancer.

The disease is known for its aggressive nature. On average, triple-negative breast cancer recurs or spreads within about 2½ years, compared with around five years for other forms of breast cancer. Additionally, nearly half of patients never receive a second line of treatment.

Both AstraZeneca and Gilead are now investigating their therapies in earlier stages of breast cancer.

The Ebola outbreak in the Democratic Republic of the Congo (DRC), driven by the Bundibugyo virus, continues to grow rapidly.

According to the latest government data, the number of confirmed cases in the DRC has risen to 1,118, including 291 deaths.

As of June 24, Uganda had reported 20 confirmed cases, including two deaths. The most recent case was reported on June 21, and no new cases have been recorded since.

Among the confirmed cases in Uganda, 15 had travel links to the DRC and five were linked to local transmission.

Outside Africa, France has reported a confirmed Ebola case in a doctor who returned from a humanitarian mission in Ituri province, the hardest-hit region in the DRC, with 997 confirmed cases and nearly 280 deaths.

What Makes Bundibugyo Virus Unique?

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Bundibugyo is one of the rarest Ebola virus strains. There have been only two previous outbreaks: one in Uganda in 2007 and another in the DRC in 2012, with case fatality rates of 32% and 55%, respectively.

A key difference is that there is currently no approved vaccine for the Bundibugyo strain. Vaccines are available for the Sudan and Zaire Ebola strains, but treatment for the Bundibugyo virus remains limited to supportive care.

The Unusual Symptoms Seen in Bundibugyo Patients

In a Correspondence published in The New England Journal of Medicine (NEJM), researchers from the Institut National de Santé Publique in Kinshasa analyzed the clinical characteristics of Bundibugyo virus disease (BVD).

Researchers recorded symptoms in 405 patients with confirmed BVD and 516 people who tested negative.

Among confirmed BVD patients, the most common symptoms were:

• Fever (74.3%)
• Diarrhea (67.4%)
• Vomiting (66.7%)
• Headache (42.2%)
• Loss of appetite (39.5%)
• Abdominal pain (37.3%)
• Difficulty breathing (34.1%)
• Difficulty swallowing (32.8%)
• Muscle pain (23.5%)
• Joint pain (22.7%)

Notably, bleeding-related symptoms, often associated with Ebola, were relatively uncommon and were reported in only 10.4% of patients at presentation.

Bundibugyo: Symptoms That Differed Between Men and Women

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The symptom profile was largely similar across age groups and between men and women. However, fever was slightly less common among men, while headaches became less frequent with increasing age. Men were also somewhat more likely to report cough and chest pain, the researchers said.

Bundibugyo: Symptoms That Distinguished Confirmed Cases

Compared with people who tested negative, patients with confirmed BVD were much more likely to experience gastrointestinal and systemic symptoms.

• Vomiting: 66.7% vs. 50.8%
• Diarrhea: 67.4% vs. 49.6%
• Loss of appetite: 39.5% vs. 17.2%
• Abdominal pain: 37.3% vs. 16.3%
• Difficulty breathing: 34.1% vs. 10.9%
• Difficulty swallowing: 32.8% vs. 10.7%
• Fever: 74.3% vs. 64.9%

How Was The Study Conducted

The researchers reviewed 2,351 recorded cases in the individual-level database for BVD between May 3 and June 8, 2026.

Of these, 505 patients (21.5%) had laboratory-confirmed BVD based on PCR testing, while 635 patients (27.0%) who were suspected of having the disease tested negative.

Researchers noted that patients with confirmed BVD were demographically similar to those who tested negative. In both groups, most patients were adults aged 20 to 39 years, and women slightly outnumbered men.

Higher Viral Load Linked to Death

Among 253 patients with laboratory-confirmed infection tested using the RADIONE PCR assay in Bunia, Ituri Province, researchers found that patients who died generally had lower cycle-threshold (Ct) values, indicating a higher viral load, than those who survived.

Among 129 patients with available symptom-onset and sample-collection dates, the mean delay between symptom onset and testing was 7.4 days, with a median delay of 4.8 days.

Earlier diagnosis and treatment could improve survival rates and help reduce virus transmission within communities, the researchers said.