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 United States is in the midst of one of the worst measles outbreak. It has reported more than 5,000 measles cases in 2026, marking the highest annual total cases since 1991.

This has raised concerns that the country could lose its measles elimination status after more than 25 years.

Measles Cases In The US Cross 5,000

Also read: EXCLUSIVE: Ex-CDC Vaccine Advisor Says Measles Outbreak Bigger Than Reported, Slams RFK Jr’s ‘No-See Evil’ Approach

According to an update issued on November 6, the US Centers for Disease Control and Prevention (CDC) reported 5,182 confirmed cases as of November 5. This is the first time since 1991 that the annual number of infections has crossed the 5,000 mark.

The latest figure marks an increase of 330 cases from the previous week. The CDC also reported 562 hospitalisations due to measles this year, which accounts for 11% of confirmed cases.

The outbreak has spread across 47 jurisdictions and 43 outbreaks reported so far in 2026. Approximately around 96% of infections have been linked to outbreaks, while 96% of people infected were either unvaccinated or their vaccination status was unknown.

The expanding measles outbreak has sparked concerns about the country's ability to maintain the elimination status it achieved in 2000.

Could The US Lose Its Measles Elimination Status?

Also read: 'It’s The Best-Studied Vaccine In Human History': Former CDC Adviser Busts Common Myths About COVID Vaccines

The US declared measles eliminated in 2000, meaning that the country had stopped continuous transmission of the virus for at least 12 months, but infections could still occur when people brought the virus into the country from abroad. However, recent outbreaks have raised concerns that measles could become endemic again.

According to the CDC, elimination status is determined by the absence of continuous measles transmission in a geographical area for 12 months or longer, supported by an effective disease surveillance system.

The United States is facing a review of its elimination status by the Pan American Health Organization (PAHO), which is expected to assess the country's progress in controlling transmission during its November 2026 meeting.

The review will examine whether the ongoing outbreaks represent sustained transmission of the virus and whether the country continues to meet the criteria for elimination. Losing elimination status would that the country had failed to interrupt sustained transmission of the virus.

The Americas region had already lost its measles elimination status in November 2025 after Canada experienced continuous transmission for at least 12 months.

What Happens If The US Loses Its Elimination Status?

Also read: US Midterms: Where Did Voters Support Abortion Rights And Where Did They Reject Them?

Losing measles elimination status would mark a major setback for public health efforts that successfully interrupted continuous measles transmission in the country in 2000.

It would also signal that the virus is circulating continuously within the population rather than appearing mainly through imported infections that cause outbreaks that get eventually contained.

However, elimination status can be regained if sustained transmission is interrupted and the required criteria are met. Public health experts continue to emphasise the importance of maintaining high vaccination coverage, identifying cases quickly and responding to outbreaks promptly.

Who Is Being Affected By The US Measles Outbreak?

The latest CDC data show that measles is affecting people across different age groups. Adults aged 20 and older accounted for 2,132 cases, followed by 2,104 infections among people aged five to 19. Children younger than five accounted for 908 cases.

The CDC reported four measles deaths in 2026, compared with three during the whole of 2025. However, the CDC's national death count differs from figures reported by individual state health departments because the agency uses National Center for Health Statistics mortality data for its official tally.

Pennsylvania has been among the hardest-hit states, reporting 1,487 cases, 287 hospitalisations and six associated deaths, according to Reuters. The outbreak has also spread to South Carolina and Utah, which reported 670 and 536 cases, respectively.

According to state health department reports, the country has recorded eight measles-related deaths this year: six in Pennsylvania, one in New York and one in Wisconsin. At least four involved children or infants.

Life-threatening bleeding episodes among US infants have risen sharply as more parents refuse the routine vitamin K shot given at birth, two new studies have found.

Published in JAMA and JAMA Pediatrics, the studies found that the proportion of newborns who missed the vitamin K shot more than doubled between 2017 and 2025, reaching 6.8%. These infants were also more likely to experience bleeding, including bleeding in the brain.

Although the studies do not establish causation, the parallel rise in refusals and bleeding episodes is significant, said Dr Steven Woolf, an epidemiologist at Virginia Commonwealth University and lead author of the JAMA Pediatrics study, as reported by NBC News.

"Now we're stepping away from that, and we're seeing the consequences," Woolf said.

Vitamin K shots have been standard newborn care since 1961 and help prevent vitamin K deficiency bleeding (VKDB), a rare but potentially life-threatening condition.

Infant Bleeding Episodes Nearly Quadrupled Since 2017

Woolf and colleagues analysed medical records of more than 11 million infants aged six months and younger between 2017 and 2025.

During this period, the proportion of newborns receiving a vitamin K shot fell from 97.7% to 95%, while vitamin K deficiency bleeding nearly quadrupled.

The researchers identified 5,217 bleeding events during the study period. The rate in 2025 was approximately double that in 2024, Woolf said.

The researchers noted that the increase coincided with declining public trust following the COVID-19 pandemic, growing vaccine hesitancy and parental scepticism about routine newborn interventions.

Vitamin K Refusals More Than Double To 6.8%

A separate JAMA study by Dr Kristan Scott and colleagues analysed medical records of more than 5.2 million US infants born between 2017 and 2025.

The proportion of newborns who missed the vitamin K shot rose from 3.1% in 2017 to 6.8% in 2025. It had reached 5.1% by the end of 2024.

The study also found that infants who did not receive the shot had:

• A 47% higher risk of bleeding during their first six months.
• More than twice the risk of bleeding in the brain.
• More than twice the risk of death associated with a bleeding diagnosis during their birth hospitalisation.

The authors estimated that one additional bleeding event would occur for every 114 newborns who missed the vitamin K shot.

Separately, an analysis of more than one million births by health data company Truveta for Reuters found that vitamin K refusals increased by more than 57% between January and June 2026.

Why Is Vitamin K Important For Newborns?

Vitamin K is a fat-soluble nutrient essential for blood clotting and bone health. Newborns naturally have low levels, leaving them vulnerable to VKDB.

The American Academy of Pediatrics (AAP) has recommended a vitamin K injection for all newborns since 1961.

Without adequate vitamin K, babies can develop spontaneous bleeding, including severe internal bleeding and bleeding in the brain. These episodes can cause permanent brain damage or death.

Importantly, the vitamin K shot is not a vaccine. It is a one-time injection given shortly after birth to protect babies against VKDB.

Breast milk contains relatively little vitamin K. Exclusively breastfed babies who miss the birth injection therefore remain vulnerable to deficiency bleeding.

The researchers also found increased use of oral vitamin K. However, oral doses are less effective than intramuscular injections, particularly in preventing late-onset VKDB, which can occur weeks or months after birth.

Why Are More Parents Refusing Vitamin K Shots?

Vitamin K refusals have risen since the COVID-19 pandemic amid growing parental concerns about vaccines and routine newborn interventions.

Health experts have also raised concerns about declining trust in health authorities and mixed messages surrounding preventive care.

Refusals have accelerated under US Health Secretary Robert F Kennedy Jr, who has questioned vaccine safety and overseen changes to federal childhood vaccination recommendations.

A US Department of Health and Human Services spokesperson said the Centers for Disease Control and Prevention (CDC) continues to recommend vitamin K shots for newborns. However, the department did not say whether the agency would begin tracking refusals or associated bleeding episodes.

Measles, a highly contagious but vaccine-preventable disease, has claimed another young life. Wisconsin has reported its first measles-related death since 1990, taking the reported US death toll to eight in 2026.

The US, which eliminated sustained domestic measles transmission in 2000, is witnessing a major resurgence. The Centers for Disease Control and Prevention (CDC) reported 4,852 confirmed measles cases as of October 29.

According to state health department reports, the country has recorded eight measles-related deaths this year: six in Pennsylvania, one in New York and one in Wisconsin. At least four involved children or infants.

However, the CDC has not yet updated its website and has confirmed only four measles-associated deaths so far this year.

Childhood vaccination rates have declined in recent years, falling below the 95% coverage generally needed to prevent outbreaks.

Disruptions to routine childhood immunisation during the COVID-19 pandemic, declining vaccination coverage and growing vaccine hesitancy have contributed to the resurgence. Vaccine scepticism has also been amplified by anti-vaccine messaging from the Donald Trump-led administration, including Health and Human Services (HHS) Secretary Robert F. Kennedy Jr.

Also read: Pennsylvania Reports Sixth Measles Death As Outbreak Crosses 1,400 Cases Across 45 Counties

What Happened In The Wisconsin Case?

The Wisconsin Department of Health Services (DHS) reported the death of an infant due to measles, marking the state's first such death since 1990.

The coroner listed measles as the immediate cause of death, according to the official statement. DHS said it would not release additional information to protect the privacy of the child and family.

"It is with a heavy heart we are reporting the first death of an infant connected with a measles outbreak in Wisconsin in many years. My heart is broken for the family," said DHS Secretary Kirsten Johnson.

"Any death of a child is a tragedy and even more so when it is related to a vaccine-preventable disease. Measles can cause serious illness and death, and all Wisconsinites need to evaluate their risk and take steps to protect themselves and their family."

Wisconsin Reports More Than 400 Measles Cases

Also read: EXCLUSIVE: Ex-CDC Vaccine Advisor Says Measles Outbreak Bigger Than Reported, Slams RFK Jr’s ‘No-See Evil’ Approach

As of November 3, Wisconsin had reported 431 measles cases across 13 counties in 2026, the highest number recorded in the state in more than 35 years. Nine people have required hospitalisation due to severe symptoms.

Reported case counts may not reflect the full extent of transmission. Not everyone who develops symptoms seeks medical care or undergoes testing, meaning some infections may go unreported.

Why Are Children At Risk?

Declining childhood vaccination coverage is a major concern. US vaccination rates have fallen below the 95% coverage generally needed to prevent measles outbreaks.

Children younger than five years, pregnant people and those with weakened immune systems are at increased risk of severe complications.

Two doses of the measles, mumps and rubella (MMR) vaccine are approximately 97% effective against measles. Children as young as six months may receive an early dose in certain circumstances, including travel to areas experiencing outbreaks. This early dose does not replace the two routine doses recommended later in childhood.

What Are The Symptoms And Complications Of Measles?

Measles spreads through the air when an infected person coughs or sneezes. The virus can remain infectious in the air or on surfaces for up to two hours.

Initial symptoms include:

• High fever
• Cough
• Runny nose
• Red, watery eyes

A rash usually develops several days later, beginning on the face and spreading down the body.

Although many people recover, measles can cause serious and potentially life-threatening complications, including pneumonia and encephalitis, or inflammation of the brain. The infection can also weaken the immune system, increasing vulnerability to other infections.