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.

In a first for India, Maharashtra has allowed qualified homeopathy practitioners to prescribe certain modern medicines after completing a one-year Certificate Course in Modern Pharmacology (CCMP).

The decision has sparked strong opposition from the Indian Medical Association (IMA) and several doctors' bodies, which have announced protests, citing concerns over patient safety, medical education, and professional standards.

What Is The Debate All About?

Under a Government Resolution (GR) issued on August 3, Maharashtra has allowed BHMS graduates who have completed the one-year Certificate Course in Modern Pharmacology (CCMP) to register with the Maharashtra Medical Council (MMC). The registration allows eligible practitioners to prescribe specified modern medicines under the state's policy.

The MMC began registering CCMP-qualified practitioners on August 5. According to reports, one practitioner has been registered so far, while around 2,500 applications remain pending.

The IMA has warned of a nationwide strike if the Maharashtra government does not withdraw its decision. In a letter to Maharashtra Chief Minister Devendra Fadnavis, signed by IMA National President Dr. Anilkumar J. Nayak and Secretary General Dr. Sarbari Dutta, the association demanded immediate withdrawal of both the GR and the CCMP course.

Why Is the IMA Objecting?

The IMA has raised the following concerns:

• No approval from national regulators:

• Opposition to dual registration:

• Matter pending before the court

• Concerns over medical education

What Is the CCMP Course? Why Was It Introduced?

The Certificate Course in Modern Pharmacology (CCMP) is a one-year program introduced in Maharashtra in 2016 by the Maharashtra University of Health Sciences (MUHS). It is designed for BHMS (Bachelor of Homeopathic Medicine and Surgery) graduates and trains them in aspects of modern pharmacology and allopathic medicine.

The CCMP course was introduced following a major agitation by homeopathic associations, including a 13-day indefinite hunger strike in Nagpur in 2013, demanding legal rights to prescribe essential modern medicines.

According to the Maharashtra government, the objective was to strengthen healthcare delivery, particularly in areas facing shortages of doctors.

To facilitate the course, the state amended the Maharashtra Homoeopathy Practitioners' Act, 1960 and the Maharashtra Medical Council Act, 1965 in 2014, after the legislation was passed by both Houses of the State Legislature.

The IMA now argued that the situation in 2014 when the MMC Act was amended is very different from the situation now.

The medical body cited the cancellation of "bond system for MBBS graduates due to the nonavailability of vacant posts for them even in rural areas- signifying sufficient availability of MBBS doctors".

What Does the CCMP Course Include?

According to the government, the one-year CCMP curriculum was developed by expert committees at MUHS after comparing the BHMS and MBBS syllabi to bridge gaps in training.

The course includes:

• Training in modern pharmacology
• Practical laboratory procedures
• Rotational hospital training in clinical subjects of allopathy
• Teaching at government and private medical colleges
• Examinations conducted by the Faculty of Medicine, MUHS

The government says the program is intended to make registered homeopathic practitioners competent to prescribe specified modern medicines and improve access to healthcare in the state.

But the IMA has argued that such "short-term certification or bridge courses cannot substitute for comprehensive medical education". They also warned that permitting cross-practice would compromise patient safety.

What's Next?

The Maharashtra Association of Resident Doctors (MARD) began an indefinite statewide strike on August 3. On August 5, doctors across Mumbai withdrew routine outpatient department (OPD) services in protest against the government's decision.

Doctors from Pune are scheduled to join their counterparts in Mumbai for demonstrations at Azad Maidan on August 6. The IMA has warned of a nationwide strike if the Maharashtra government does not withdraw the decision. The IMA Kerala State Branch has also extended support to the Maharashtra doctors' protest.

A severe COVID-19 infection may awaken dormant viruses that remain hidden in the body for life, even in people with otherwise healthy immune systems, according to a study published in Nature.

The study, which analyzed more than 1,100 hospitalized COVID-19 patients, found that viral reactivation was common and may contribute to long COVID symptoms. Researchers said the findings suggest COVID-19 can disrupt the body's internal ecosystem of dormant viruses, creating a state they describe as "dysvirosis."

"This finding suggests that COVID-19 may not always act as a single viral infection and may disrupt the body's internal ecosystem of dormant viruses, creating a state of 'dysvirosis'," said lead author Cole Maguire from Dell Medical School at The University of Texas at Austin.

Which Dormant Viruses Were Reactivated?

Nearly half of the hospitalized patients had at least one dormant virus reactivate during their COVID-19 illness. The viruses identified included:

• Epstein-Barr virus (EBV), which causes mononucleosis
• Herpes family viruses
• Enteroviruses
• Cytomegalovirus (CMV)
• Herpes simplex virus-1 (HSV-1)
• Human herpesvirus-6 and -7 (HHV-6/7)
• Anelloviridae, a lesser-known family of chronic viruses

Also read: Lab Leak 'More Likely' Origin of COVID-19, Says Former Biden Adviser Dr. Ashish Jha

How Viral Reactivation Affects The Body

The researchers found that viral reactivation was more common in patients with severe COVID-19 and those who had longer hospital stays, and caused:

• Increase inflammation
• Worsened tissue injury
• Prolonged recovery

The study also noted that these viruses have previously been linked to autoimmune conditions such as multiple sclerosis and lupus.

Further, the study found that dormant viruses do not reactivate simultaneously after SARS-CoV-2 infection.

• Epstein-Barr virus and anelloviruses tended to reactivate early, shortly after hospital admission.
• Cytomegalovirus and herpes simplex viruses generally emerged around three weeks later, primarily in the respiratory system.

Not Limited to People With Weak Immune Systems

Earlier research had mainly observed viral reactivation in people with weakened immune systems. However, this study found that reactivation frequently occurred in people who were healthy before developing COVID-19.

According to the researchers, this suggests viral reactivation may be more common than previously believed and could contribute to worse outcomes even in otherwise healthy individuals.

How Are the Dormant Viruses Linked to Long COVID?

Read More: Can Long COVID Be Prevented Before It Starts? Study Suggests Early Paxlovid May Help

While the study does not prove that viral reactivation causes long COVID, it provides strong evidence that dormant viruses may contribute to the condition.

Researchers found that Anelloviridae appeared more frequently in patients with long COVID who experienced persistent fatigue and reduced physical function.

"Our findings have important implications for patient care. Tests already exist for several of the chronic viruses studied, and some viruses in the herpes family can be treated with existing antiviral drugs," said study principal investigator Melamed, assistant professor of neurology at Dell Medical School.

"The next step is determining whether identifying and treating reactivated viruses can improve outcomes for patients with acute COVID-19 and long COVID."

The study may also influence future treatment strategies. Researchers noted that, instead of targeting only SARS-CoV-2, clinicians may eventually be able to use existing antiviral drugs against reactivated viruses, particularly herpesviruses.

A Phase II clinical trial is already underway to evaluate antiviral therapies targeting herpesviruses in people with long COVID.

In a landmark decision, the US Food and Drug Administration (FDA) has approved Moderna's first mRNA-based seasonal influenza vaccine.

This makes it the first flu shot developed on messenger RNA (mRNA) technology to receive clearance in the United States.

The vaccine, branded mFlusiva, has been approved for adults over the age of 50 and older, paving the way for a new generation of influenza vaccines beyond the traditional egg-based approach.

Who Is Eligible To Receive The Vaccine?

The approval has given Moderna commercial drug built on the mRNA platform that powered its COVID-19 vaccine. The development is expected to strengthen the company's efforts to grow its respiratory vaccine portfolio.

According to the FDA, the following groups of people are eligible to receive mFlusiva:

• Traditional approval for adults aged 50 to 64 years.
• Accelerated approval for adults aged 65 years and older, requiring Moderna to conduct additional studies to confirm the vaccine's benefit in this age group.

Also read: Ebola Outbreak: Moderna Begins First Human Trial Of Bundibugyo Vaccine As Cases Rise to 3,748

What Did The Trial Show?

The approval was based on a late-stage clinical trial involving more than 40,000 adults aged 50 years and above. According to trial results, mFlusiva was:

• 26.6% more effective than a licensed standard-dose flu vaccine in preventing influenza.
• It also produced stronger immune responses than Sanofi's high-dose flu vaccine in adults aged 65 years and older, although Moderna will now need to verify whether this translates into better real-world protection for seniors.

Commenting on the approval, Moderna said, "Flu remains a significant public health challenge, and mFlusiva provides an important new option for America's seniors."

Earlier this year, Moderna CEO Stéphane Bancel had expressed confidence that the vaccine could become available ahead of the 2026-27 flu season if approved by regulators.

Also read: Protective Antibodies Fade After COVID-19 Vaccination- Should You Get A Booster Shot?

Why mRNA Could Revolutionise Flu Vaccination?

Unlike traditional flu vaccines, which are developed using viruses grown in chicken eggs, mRNA vaccines work by transmitting genetic instructions that alert the body's cells to produce harmless influenza proteins for an immune response.

Traditional flu vaccines must be designed and manufactured months before the flu season begins, requiring scientists to predict which influenza strains will circulate. If the circulating viruses keep evolving differently, the effectiveness of the vaccine can decline.

mRNA technology has a major advantage because it can potentially be updated and manufactured much faster, allowing vaccines to better match the strains that are spreading during a particular season.

In February 2026, the FDA initially declined to review Moderna's application, citing concerns that the company had compared its vaccine against a standard-dose flu shot rather than the high-dose vaccine commonly recommended for older adults.

After discussions with regulators, Moderna revised its submission, and the FDA agreed to proceed with the review under a condition that included additional studies for older patients.

Experts say the FDA's decision represents more than the approval of a single vaccine. It marks the first regulatory endorsement of mRNA technology for seasonal influenza, a milestone that could accelerate the development of next-generation vaccines against various infectious diseases.