There's been an alarming increase of respiratory and gastrointestinal viruses in the United States lately, causing anxiety about a so-called "quad-demic". According to surveillance reports, influenza, COVID-19, RSV and norovirus are at very high levels everywhere. While the surge aligns with patterns typical for this season, several epidemiologists view simultaneous infections of such proportions to pose risks not only to individual healthcare but public health.

The incidence of the quad-demic should vary with seasonal patterns, vaccination rates, and public health interventions. Each virus alone is relatively easy to manage; however, the effect of all together could lead to overburdening of health care facilities and increase risks for those at higher risk. Continuing surveillance, early testing, and proactive prevention measures will play an important role in the control of these infections going forward.

While the term "quad-demic" sounds daunting, it must be taken into perspective. For years, we have had all these viruses together, and we have the capabilities to mitigate some of the risk. Vaccination, proper hygiene and using common sense helps individuals get through the season unscathed. Is the quad-demic a permanent fixture or just another seasonal wave? Let's break this down.

What is the Quad-demic?

Typically, flu, COVID-19, and RSV have been the primary culprits behind seasonal respiratory infections. However, norovirus, a highly contagious stomach bug, has emerged as a fourth significant player, inducing fears of a more severe and widespread viral outbreak. According to the Centers for Disease Control and Prevention (CDC), the U.S. recorded nearly 500 norovirus outbreaks between August and December 2023, a substantial rise from the previous year’s numbers.

While the term "quad-demic" may sound ominous, the seriousness and consequences of such infections should be weighed in light of the U.S. healthcare system's experience with managing viral surges since the start of the COVID-19 pandemic.

1. Influenza (Flu)

Flu continues to be one of the most common and alarming seasonal illnesses. In the period spanning from 2023 to 2024, there were approximately 40 million cases of flu, and thousands of hospitalizations along with reported 47 deaths have been reported this season. Flu symptoms include fever, chills, cough, sore throat, muscle pain, and fatigue, with most recovering within a week or two but risky factors for severe illness effects occur in young children, elderly, and people with chronic conditions.

2. Covid-19

Despite its reduction from the first pandemic peak, COVID-19 is still rampant. The CDC estimates that alone between October and December 2023, there were between 2.7 and 5 million cases in the U.S. Hospitalization has increased by cities such as Los Angeles, Chicago, and New York. Symptoms are closely similar to the flu, fever, cough, and fatigue but uniquely presents in some cases as loss of taste and smell.

3. RSV

RSV is the most common cause of lower respiratory infections in infants, older adults, and immunocompromised individuals. While RSV peaked late in 2023 and early 2024, it continues to be a threat because it can lead to bronchiolitis and pneumonia. It is very similar to the common cold, presenting with symptoms such as congestion, runny nose, coughing, and fever, which can make it difficult to differentiate from flu or COVID-19 without testing.

4. Norovirus

Norovirus, also called the "stomach flu," is a highly contagious infection of the gastrointestinal tract, not a respiratory virus. It transmits quickly from contaminated food and water and contact with contaminated surfaces, causing such symptoms as diarrhea, vomiting, nausea, and stomach pain. Cases have shot up, the CDC said Monday, with reports of outbreaks surging compared with last year.

Is There a Challenge In Diagnosis Due to Overlapping Symptoms?

The greatest challenge during the quad-demic is how the four viruses are alike and thus make identification very hard with no testing applied. Most cases present symptoms common to all viruses: fever, tiredness, body pains, and respiratory, which includes coughing and congestions for influenza, COVID-19, and RSV; the other would be norovirus symptoms as nausea and vomiting can appear even in extreme influenza and COVID-19. This overlap increases the risk of misdiagnosis and delayed treatment, hence the need for early testing and proper medical guidance.

Also Read: Is US Preparing For A Quad- demic 2025?

Effective Prevention Strategies That Work

The best defense against these viruses is a combination of vaccines, hygiene, and lifestyle precautions. While lifestyle modifications are highlighted as part of the constant need to eat healthy, ensure daily movement and drinking adequate amount of fluids. There is a sure short two preventive strategies that are effective:

Vaccination

• Flu vaccine: Annual flu shots reduce the severity of infection, allergic flare ups and hospitalizations.
• COVID-19 vaccine: Though COVID-19 cases have declined, vaccination remains critical in preventing severe outcomes.
• RSV vaccine: Available for those aged 60 years and older, especially those with underlying conditions.
• Norovirus vaccine: No vaccine is yet available, but mRNA vaccine research is in progress.

Hygiene and Sanitation

• Washing hands frequently with soap and water for at least 20 seconds, especially after public exposure.
• Disinfect frequently touched surfaces regularly, use sanitiser when outside.
• Avoid close contact with infected people and wear masks.

Do You Need To Wear A Mask All The Time?

While debates on masked wear continue on, experts on mask-wear affirm that this does not only have a historical precedent but works towards reducing airborne viruses spreading within the environments. Hospitals, though, ensure masking in key sections of themselves. Publicized mask-wear remains a discretion, though massing indoors still goes a longer way in cases like peak flu seasons.

If you notice the symptoms of these viruses, then it's best to be confined at home and avoid having face-to-face interaction with others and seek immediate attention from your physician if your condition worsens. Quarantining for some days can decrease the spread of infection.

As we move into the first half of 2025 and beyond, staying informed and proactive is the best strategy for maintaining health and avoiding unnecessary panic. The key takeaway? Stay vigilant, but don’t be alarmed—these viruses are here, but so are the means to fight them.

India needs clearer guidelines on reproductive rights, consent, and medical ethics, said doctors after the Delhi High Court, in a highly complex and sensitive case, granted permission for the extraction and cryopreservation of sperm of an Indian Army soldier in a persistent vegetative state.

As per the guidelines laid under the Assisted Reproductive Technology (ART) (Regulation) Act, 2021, it is important to have the written consent of both partners.

However, calling it “the right to reproductive autonomy,” Justice Purushaindra Kumar Kaurav allowed for sperm retrieval. The Court also cited the soldier's prior consent to undergo IVF treatment with his wife. "It constituted valid consent under the ART Act," LiveLaw reported.

What Is the Case All About?

The wife of an Indian Army soldier had approached the Court seeking directions to allow the retrieval and preservation of her husband's genetic material to enable her to undergo IVF.

Her husband, an Indian Army soldier, suffered a severe traumatic brain injury during deployment in Jammu and Kashmir in July last year and has since remained in a persistent vegetative state.

Before the incident, the couple had already opted for IVF and initiated procedures. However, the process was halted due to the husband's inability to provide fresh written consent as required under Section 22 of the ART Act, Live Law reported.

“While ...as on date there is no express indication of consent from the petitioner's husband, however, under the facts and circumstances of the present case, it is found to be fair, reasonable, and just for the respondents to undertake the necessary procedure/steps which are required to take the IVF treatment to its logical conclusion. But for this, the original consent given by the petitioner's husband shall stand vitiated, and the very purpose for acceding to the IVF treatment shall be rendered otiose,” said Justice Kaurav, in the Court's ruling.

“It is further directed that the petitioner's consent be considered as valid consent for her husband for the purposes of IVF procedure, if the same is required for any other step/procedure. The respondents shall not disentitle the petitioner on the sole ground that the petitioner's husband's written consent is absent,” the Court said.

HealthandMe spoke to IVF specialists to understand the procedure and implications around reproductive rights, consent, and medical ethics.

How Is Sperm Retrieval Performed in a Comatose Patient?

Dr Rachita Munjal, Director and Senior Consultant - Department of Fertility at Cloudnine Group of Hospitals, Gurugram, said that sperm retrieval and cryopreservation are possible in coma/vegetative patients, but success depends on timing and medical condition.

Also read: Explained: What Is Posthumous Reproduction?

In such conditions, sperm quality may be compromised, but assisted reproductive techniques can still make conception possible.

"Cryopreservation of sperm in men who are in a vegetative state or coma is medically complex but technically feasible in many cases, depending on the underlying condition and timing," the doctor told HealthandMe.

How sperm is retrieved

Since the person cannot ejaculate voluntarily, doctors use assisted techniques, such as

• Penile vibratory stimulation (PVS): Non-invasive; works if spinal reflexes are intact
• Electroejaculation (EEJ): Electrical stimulation under anesthesia to induce ejaculation
• Surgical sperm retrieval: If the above fail. Testicular sperm aspiration (TESA), Testicular sperm extraction (TESE)
• Percutaneous epididymal sperm aspiration (PESA)

These are typically performed by urologists or fertility specialists with consent from legal guardians or prior consent of the patient. Once sperm is obtained:

• Sperm is analyzed (count, motility, morphology)
• Mixed with a cryoprotectant to prevent cell damage
• Gradually cooled and stored in liquid nitrogen at –196°C
• Can be preserved for years without significant degradation

• Cause of coma (trauma vs neurological disease)
• Time since coma onset (earlier is better)
• Baseline fertility health

• prolonged immobility
• infections
• medications (sedatives, antibiotics)
• hormonal disruption

Are There Any Ethical Considerations

There are many ethical considerations in such cases, said Dr Munjal, noting that this requires explicit prior consent or legal authorization.

“Ethical concerns include reproductive rights and future child welfare,” she added.

Dr. Sabine Kapasi, IVF Specialist & Public Health Strategist, called it “an emotionally sensitive case where law, ethics, and reproductive rights intersect”.

“While prior IVF consent may indicate shared intent to build a family, it does not always automatically equal consent for gamete retrieval during permanent incapacity. Such decisions should ideally involve explicit consent, ethics review, and psychological counseling for the family,” the expert said.

This is not the first time that sperm have been retrieved from a comatose patient.

In 2024, a Kerala High Court permitted the extraction of the sperm of a childless couple where the husband was in a brain-dead condition and kept alive with ventilator support. The Court allowed the extraction and cryopreservation of the gametes, without the written consent of the husband.

"India now needs clearer ART guidelines for coma, posthumous, and incapacity-related reproduction to avoid future disputes. Compassion is important, but medical ethics and long-term child welfare must remain central,” Dr Kapasi noted.

Former Indian cricketer Vinod Kambli is at risk of suffering from a brain stroke and is battling serious health challenges, says Marcus Couto, a friend of Kambli. In an interview with the Times of India, he revealed that Kambli had been hospitalised 18 months ago and has a clot in his brain. Because of this, his memory is impaired, Couto told TOI. He further added that Kambli remembers details briefly and then forgets them again. While Kambli has given up drinking alcohol, his friend revealed that he sometimes smokes despite it being forbidden. For Kambli’s fans, this news comes as an unfortunate update—not to forget the lingering risk of a brain stroke, given the current scenario.

Also Read: US CDC Warns Rising Drug-Resistant Shigella Cases A Public Health Threat: Here’s How To Prevent

Vinod Kambli’s health has reportedly improved recently, but concerns linger regarding his neurological health and memory. The 54-year-old is reportedly able to walk, but his memory remains inconsistent. Reports suggest that he recalls only fragments from his life, despite the fact that his health has not deteriorated in recent months. While the clot in his brain cannot be removed, his friend Couto confirmed that doctors have recommended extra care due to the risk of a brain stroke. Reports suggest that Kambli’s friends in the cricketing community have come forward to offer financial support—Sunil Gavaskar, Sachin Tendulkar, and Kapil Dev, to name a few.

Vinod Kambli is recovering despite challenges

On the brighter side, reports suggest that Kambli’s mobility has improved. Earlier relying on furniture for movement, he now walks with the help of a support stick—efforts are underway to enroll him in physiotherapy. While daily challenges persist, Kambli spends most of his time at home undergoing health check-ups. While undergoing treatment at Breach Candy Hospital, he had recovered by 60 per cent.

Are blood clots always deadly?

Blood clots usually form as the body’s natural response to a physical injury. They help prevent excessive loss of blood due to uncontrolled bleeding. However, when these clots form inside blood vessels, they can obstruct blood flow and even rupture, thereby leading to severe complications such as a stroke, damage to brain cells, and even death. In some cases, blood clots in the brain can lead to mild episodes of seizures and paralysis. Therefore, it is important to ensure prompt medical treatment.

Symptoms of a blood clot in the brain

A blood clot in the brain is known as an embolism, and its symptoms often appear suddenly and require immediate medical attention. Some of the symptoms are:

1. Weakness or numbness in one part of the body
2. Dizziness
3. Severe headaches
4. Speech difficulties
5. Disorientation
6. Memory loss
7. Behavioural changes
8. Sudden, unexplained seizures
9. Double or blurred vision
10. Vertigo or loss of balance

While Ozempic and Wegovy are best known for treating diabetes and obesity, a new mouse study has shown promise for treating liver disease, particularly metabolic dysfunction-associated steatohepatitis (MASH)—fatty liver disease.

MASH is a severe form of fatty liver disease in which fat buildup, inflammation, and tissue scarring can lead to cirrhosis and liver failure.

The benefits seen were independent of weight loss, revealed the study, which challenges long-held assumptions about how GLP-1 medicines work in the liver and could reshape how physicians treat metabolic liver disease.

Researchers at Mount Sinai Hospital found that patients taking semaglutide—the active ingredient in the popular weight loss drugs—showed improvements in the fatty liver condition that went beyond what could be explained by blood sugar control and weight loss alone.

The finding, published in the journal Cell Metabolism, explained that semaglutide, which mimics the gut hormone GLP-1, acts directly on a subset of liver cells to improve organ function and does so independently of weight loss.

"We've seen in clinical trials that patients who lose very little weight see the same reductions in liver inflammation, scarring, and enzyme levels as those who lose a great deal of weight. Now we know why," said Dr. Daniel Drucker, a senior investigator at the Lunenfeld-Tanenbaum Research Institute, who led the study.

"We're not saying weight loss isn't important, because many things improve when patients lose weight. But we now know that weight shouldn't be the only measure of success, because GLP1 medicines will improve liver health whether or not the patient loses weight," he added.

Semaglutide Could Reverse Fatty Liver Disease

There is a prevailing assumption that liver cells do not carry the receptor that semaglutide binds to, meaning the drug has no direct route to the organ.

To better understand, Postdoctoral fellow Dr. Maria Gonzalez-Rellan combined sophisticated mouse models of MASH with deep molecular analyses of liver cells.

The results identified two cell types carrying semaglutide receptors: liver sinusoidal endothelial cells (LSECs) and immune T cells.

Although LSECs account for only about 3 per cent of liver cell volume, they proved to be the key driver of semaglutide's liver benefits.

LSECs line the tiniest blood vessels in the liver and are studded with pores that allow them to act as a molecular sieve, filtering substances passing between the liver and the bloodstream.

“Semaglutide reversed MASH in mice that lacked the brain receptors controlling appetite, demonstrating that weight loss is not required for liver benefits,” Dr. Gonzalez-Rellan said.

In a further test, mice lacking LSEC receptors showed no liver improvement on semaglutide even after losing 20 per cent of their body weight.

How This Will Impact Patients

The findings carry practical implications. GLP-1 medicines have become widely prescribed, yet their mechanism of action in the body, beyond appetite suppression and blood sugar control, is not well understood

Knowing that semaglutide improves liver health independently of weight loss could influence prescribing decisions.

Physicians may choose lower doses that avoid the side effects associated with the higher doses needed for significant weight loss, potentially also lowering costs for patients, said Dr. Drucker.