Low-dose CT chest scans could help detect pneumonia in at-risk patients while exposing them to only small amounts of radiation, a new study has found. The research, published in Radiology: Cardiothoracic Imaging, shows that ultra-low-dose scans can effectively detect pneumonia in patients with compromised immune systems, enabling doctors to treat the infection before it becomes life-threatening. According to the researchers, these scans expose patients to just 2% of the radiation dose used in a standard CT scan.

"This study paves the way for safer, AI-driven imaging that reduces radiation exposure while preserving diagnostic accuracy,” lead researcher Dr Maximiliano Klug, a radiologist with the Sheba Medical Center in Ramat Gan, Israel, said in a news release. He added that CT scans are the gold standard for detecting pneumonia but there are concerns regarding the risk posed by repeated exposure to radiation. There is a solution- ultra-low-dose CT scan. However, the problem is that these scans can be grainy and hard to read, researchers said.

Study Gives Solution To This

To overcome that, Klug's team developed an AI program that could help "de-noise" low-dose scans, making them sharper and easier to read. Between September 2020 and December 2022, 54 patients with compromised immune systems who had fevers underwent a pair of chest CT scans -- a normal dose scan and an ultra-low-dose scan. The AI program cleaned up the low-dose scan, and then both sets of images were given to a pair of radiologists for assessment. Radiologists had 100% accuracy in detecting pneumonia and other lung problems with the AI-cleaned low-dose scans, but 91% to 98% accuracy in examining the scans that hadn’t been improved through AI, results show.

"This pilot study identified infection with a fraction of the radiation dose," Klug said. "This approach could drive larger studies and ultimately reshape clinical guidelines, making denoised ultra-low dose CT the new standard for young immunocompromised patients.

How Can You Detect Pneumonia?

Pneumonia is a lung infection that causes the air sacs in the lungs to fill with fluid or pus and can be caused by bacteria, viruses, or fungi. The symptoms can range from milk to severe, which includes:

Coughing with or without cough

Fever

Chills

Trouble breathing

Chest pain, especially when breathing deeply or coughing

Sweating or chills

Rapid heart rate

Loss of appetite

Bluish skin, lips, and nails

Confusion.

How to detect Pneumonia in coughing newborns and toddlers?

Pneumonia can severely affect newborns and young children as their lungs are comparatively more sensitive. As per Dr Goyal, young children can cough for various reasons including seasonal infections and tonsillitis, which is very common in this age group. But if they look visibly irritable and have poor sleep patterns, then parents must reach out to an expert. "I am not saying that parents must visit a hospital but any local paediatrician would be able to detect pneumonia in your kid.

The Ebola outbreak, declared an emergency in May, continues to spread in the Democratic Republic of the Congo (DRC). According to the latest update from DRC health authorities, confirmed cases have surpassed 8,000, while the death toll is nearing 4,000.

The World Health Organization (WHO) warned that the outbreak remains large, geographically expanding and marked by sustained transmission.

The DRC “had recorded 8,067 confirmed cases, including 3,901 deaths, with a case fatality rate of 48.4 per cent,” according to the latest government situation report. It has spread to seven health zones.

“The continuously high case fatality ratio, and especially the continuous high rate of deaths occurring in communities, highlights the seriousness of the disease and the persistent challenges in timely case detection and access to early and adequate patient care,” the WHO said in its latest Disease Outbreak News.

However, Dr Janet Diaz of the WHO’s Health Emergencies Program told reporters in Geneva that “we are beginning to see a reduction in transmission in some areas, the number of cases remains high for this outbreak”.

Treatment Delays Remain A Concern

Dr Diaz said that although it is known that “early access to care can significantly improve chances of survival,” “Yet in this outbreak, many people are still dying at home or in their communities because they are unable to reach health facilities on time.”

“Delays in seeking care, together with challenges in access and referral, continue to complicate the response,” she said, adding that WHO and its partners have focused on improving early recognition of illness, rapid referral systems and early supportive care.

“Every patient bed requires a skilled workforce to provide safe, quality care around the clock,” Dr Diaz said.

Oxygen Access A Key Challenge

A key component of supportive care for patients with Ebola, particularly those with severe illness, is oxygen. Yet this life-saving medicine remains “unavailable or unreliable in many health facilities, especially in emergency settings”.

Ensuring access to oxygen requires functioning health systems, reliable infrastructure, trained health workers and sustainable delivery systems “that reach patients wherever they are”.

“Without previous oxygen scale-up efforts in Ebola and Marburg [virus disease] responses, we would not be where we are today in terms of more positive outcomes for patients,” she noted.

Vaccine Trials Underway

While there is currently no approved vaccine against Ebola Bundibugyo virus, vaccine trials are underway.

Clinical trials of specific vaccines and treatments against the Bundibugyo virus are also ongoing. The DRC also received more than 70,000 doses of the Ervebo vaccine last month. Ervebo is approved for protection against the more common Zaire Ebola virus.

DRC’s 17th Ebola Outbreak

The outbreak, caused by the rare Bundibugyo virus, was declared by the WHO on May 15. It is the DRC’s 17th Ebola outbreak since the virus was first identified in 1976.

It is also the second-deadliest Ebola outbreak on record, behind the West African outbreak that lasted from 2014 to 2016.

You can exercise regularly, eat reasonably well and have no obvious symptoms — yet still have plaque building up inside your arteries.

The process called atherosclerosis is often slow and silent, with symptoms appearing only after plaque significantly affects blood flow — sometimes with a heart attack or stroke.

A study published earlier this month in The New England Journal of Medicine (NEJM) found that plaque buildup can begin decades before symptoms appear. Researchers detected atherosclerosis in many apparently healthy young adults, including those in their 20s.

Atherosclerosis Can Start Decades Before Symptoms

The NEJM study showed that signs of hidden atherosclerosis could be detected in approximately one in 13 people aged 18–29. Among those aged 60–70, nine out of 10 showed signs of atherosclerosis.

Dr. Robert Grant, St. George’s University School of Medicine, Grenada, West Indies, told HealthandMe that the most important message is that atherosclerotic cardiovascular disease often begins decades before symptoms appear. Heart attacks and strokes are usually late manifestations of a process that develops gradually over many years.

“Atherosclerosis is not exclusively a disease of older adults. Clinical complications remain predominantly diseases of older adults. The pathological process often starts much earlier than the clinical disease becomes evident," he said.

The study therefore shifts our thinking from "atherosclerosis is an old-age disease" to "atherosclerosis is a lifelong disease that becomes clinically important with advancing age," he added.

Can Exercise And A Healthy Diet Protect?

Regular exercise, a healthy diet, avoiding smoking, maintaining a healthy weight, and good sleep remain important preventive measures, said Dr. Robert.

“These habits lower LDL cholesterol, improve blood pressure, reduce inflammation, improve insulin sensitivity, and substantially reduce cardiovascular event rates," he said. “They are foundational and should not be minimized.”

However, healthy lifestyles do not guarantee the absence of atherosclerosis. Other risk factors include:

• Genetic predisposition and family history
• Elevated lipoprotein(a) [Lp(a)]
• Insulin resistance or diabetes
• Previously elevated LDL levels during earlier life
• Hypertension that has gone undetected or untreated

Dr. Rajat Mohan, Senior Consultant Cardiologist at Sir Ganga Ram Hospital, also stressed that people who exercise and eat in moderation can still develop coronary disease because of other risk factors, including genetic tendencies.

He also emphasized the need to check cholesterol levels and avoid smoking.

Why Indians May Be More Vulnerable

Coronary artery disease has a high burden in the Indian population, with diabetes, family history, smoking and tobacco use among the factors contributing to risk, Dr. Rajat told HealthandMe.

"Diabetes is a precursor for developing coronary artery disease," he said.

Dr. Ramakanta Panda, renowned cardiac surgeon and Chairman, Asian Heart Institute, Mumbai, also pointed to studies suggesting greater vulnerability to early atherosclerosis among Indians.

Referring to the INTERHEART study, he said that Indians get their first heart attack 5-6 years earlier than people from other regions, and a UK study found double the risk compared with Europeans.

Can Normal Cholesterol And Blood Pressure Be Reassuring?

“Yes. The "normal" LDL range is not truly safe for arteries. In US adults without traditional risk factors, coronary atherosclerosis rose from 13.2% when LDL-C was below 70 mg/dL to 48.2% when it was 160 mg/dL or higher. Non-HDL cholesterol and apoB showed similar associations," Dr. Ramakanta told HealthandMe.

He added that beyond standard readings, doctors should consider:

• apoB and lipoprotein(a)
• HbA1c and insulin resistance
• Waist circumference and fatty liver
• hsCRP
• Premature family history
• Kidney disease and pregnancy complications
• Where appropriate, calcium scoring

Should Screening Be Universal?

Dr. Ramakanta said that mass screening has not been shown to reduce death rates significantly. However, targeted screening or testing can be helpful. For an apparently healthy person with no symptoms, a sensible approach is:

• Blood pressure
• Fasting glucose/HbA1c
• Lipid profile, particularly LDL
• Weight/BMI and waist circumference
• Smoking/tobacco, physical activity, diet and family history of premature heart disease
• Assess the person’s overall cardiovascular risk and treat modifiable risk factors accordingly

"The ESC specifically recommends systematic risk assessment in people without known cardiovascular disease. I would not recommend routine ECG, treadmill testing, echocardiography, or coronary CT for every asymptomatic individual unless they have risk factors.”

With the onset of winter, Delhi sees a sharp deterioration in air quality, exposing people across age groups to health risks including respiratory problems and eye irritation, among others.

Ahead of the season, the Delhi government has announced 10 interventions targeting major pollution sources, including vehicles, dust, waste and industrial emissions.

“Delhi Clean Air Action 2026 puts 10 focused interventions at the heart of the fight against pollution, targeting key sources from vehicles and dust to waste and industrial emissions. Cleaner air is a shared goal,” Delhi Chief Minister Rekha Gupta said in a post on X.

“We urge every Delhiite to join this effort through active Jan Bhagidari. Every responsible action counts towards a cleaner, healthier Delhi,” she added.

The measures were discussed during a review meeting with the Commission for Air Quality Management (CAQM) and the Delhi Pollution Control Committee (DPCC).

Also read: World Lung Day: Dry Cough, Breathlessness May Not Always Be Asthma — Could It Be ILD?

What Are The 10 Interventions?

The key measures undertaken include:

1. No PUCC, No Fuel

Enforcement at all 500 ANPR-enabled fuel stations, backed by a city-wide awareness campaign.

2. Public Transport First

Delhi Metro Sarthi App campaign from October 1–10; last-mile connectivity at all 228 Metro stations. Bus fleet: 6,840, including 5,088 e-buses.

3. Hotspot Action

42 of 50 pollution hotspots addressed, with traffic decongestion measures planned for the remaining areas.

4. Dust Control

1,193 km of roads redeveloped; remaining work targeted by November 15. Footpath paving and faster complaint resolution also planned.

5. No Open Waste Burning

Ward-level monitoring and stronger waste collection; 98 MRSMs, up from 76 last year. Dedicated monitoring teams by October 15.

6. Greening Drive

71 lakh plantations completed; 433 of 434 acres of identified brown areas greened.

7. Construction Waste Control

Malba App registration to be mandatory for building-plan approvals. Construction restrictions begin November 1, followed by a complete ban from December 10 to January 20.

8. Winter Protocol

Doubled parking charges, staggered office timings and 50% work-from-home. Restrictions on non-Delhi, below-BS-VI vehicles from November 1, except CNG and EVs.

9. EV Push

Higher incentives for scrapping old vehicles and registration drives under the Parivartan Scheme.

10. Industrial Pollution

Monitoring stations to rise from 47 to 60, with 334 enforcement teams and an AI-enabled Command and Control Centre.

Read More: Can Air Pollution Raise Suicide Risk? Study Finds A Possible Link

Why Does Delhi’s Air Quality Worsen In Winter?

Delhi-NCR’s air quality deteriorates during the colder months as emissions combine with unfavorable weather conditions.

According to CAQM, falling wind speeds, shallow atmospheric mixing, fog and low temperatures reduce the dispersion of pollutants, allowing particulate matter to accumulate near the ground.

How Does Air Pollution Affect Health?

Air pollution contains tiny particles such as PM2.5 and PM10, along with gases including nitrogen dioxide from vehicle exhaust, sulfur dioxide from industrial emissions and carbon monoxide.

PM2.5 is of particular concern because these extremely small particles can penetrate deep into the lungs and, after entering the bloodstream, trigger inflammation and affect other organs.

The health effects of air pollution go beyond respiratory symptoms such as coughing, wheezing and breathing difficulties. Long-term exposure has been linked to a higher risk of heart disease, stroke, lung cancer, diabetes and chronic respiratory diseases. Exposure during childhood can also affect lung development and respiratory health.

Reducing exposure to polluted air remains important, particularly during periods of poor air quality. A balanced diet and adequate nutrition can also support overall health, although nutrition cannot replace measures to reduce exposure to air pollution.