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.

Rising global temperatures are driving heatwave conditions in India, said the Indian government, while releasing an advisory to warn people about the increased health risks.

Taking to the social media platform X, the Ministry of Health and Family Welfare urged the public to take precautions during extreme heat.

"Heat waves are increasing due to rising global temperatures," said the Ministry in the advisory.

It shared safety measures and an informative poster explaining the impact of rising temperatures and steps to manage heat stroke.

The poster highlighted that a rise of 1 degree Celsius in global temperatures can lead to longer durations of heatwaves.

Further, it stated that insufficient hydration during heatwaves reduces the body's natural ability to cool itself, which can result in heat stroke.

The poster also detailed preventive measures to avoid heat stroke. It also advised people to avoid heavy work during mid-noon hours, drink plenty of water, avoid consuming heavily caffeinated or sugary drinks as they may cause dehydration, wear light-colored clothes, and take frequent breaks while working outdoors.

Which States Are At Risk?

The India Meteorological Department (IMD) has warned of heatwave conditions in several parts of the country.

Regions likely to face extreme heatwave conditions until April 20 include Telangana and Rayalaseema, Madhya Maharashtra and Marathwada, North Interior Karnataka, Madhya Pradesh, Chhattisgarh, Vidarbha, Odisha, Jharkhand, and West Rajasthan.

In addition, hot and humid weather conditions are expected in coastal regions such as Kerala, Tamil Nadu, Gujarat, and Coastal Andhra Pradesh.

Meanwhile, the national capital saw its hottest day of the year on Wednesday, as temperatures climbed sharply, signaling the onset of harsher summer conditions. According to IMD, the maximum temperature at Safdarjung, the city’s base station, touched 39.2 degrees Celsius, about 3 degrees above normal. This surpassed Tuesday’s 38.2 degrees Celsius, marking a noticeable upward trend.

While the mercury is expected to inch closer to 42 degrees Celsius by Friday, the weather office has ruled out heatwave conditions for at least the next week.

“A gradual rise is expected in maximum temperatures by 2-3 degrees during the next three days and fall by 1-2 degrees thereafter. The maximum temperatures are likely to be above normal to appreciably above normal during the next seven days," Times Of India quoted a Met official as saying.

As per the weather department, despite a slight chance of light rain in parts of Haryana and NCR on April 17 and 18, there is no relief expected for Delhi.

Forecasts suggest daytime temperatures will hover between 39 degrees Celsius and 41 degrees Celsius on Thursday, rising further to 40-42 degrees Celsius from Friday through Sunday.

The IMD has cautioned that such above-normal temperatures could pose moderate health risks, especially for infants, elderly individuals, and those with chronic illnesses.

Hydration Is key, Say Doctors

Dr. Anil Gomber, Director and Senior Consultant – Internal Medicine & Diabetologist, Yatharth Hospital, told HealthandMe: “It is crucial to take preventive measures to avoid heat-related illnesses".

Prolonged exposure to high temperatures can lead to dehydration, heat exhaustion, and heatstroke, which can be fatal if untreated.

Heat also places extra strain on the heart and lungs, increasing the risk of heart attacks and respiratory distress.

Heatwaves can increase the risk of deaths among the elderly and those with underlying medical conditions. It can also affect healthy and young people. Exposure to intense heat can cause headaches, dizziness, cramps, and fainting, particularly for those working outdoors or engaging in strenuous activity.

"Elderly people, kids, and those with chronic conditions like heart disease or diabetes face higher risks, so check on neighbors and family daily," Dr. Meenakshi Jain Principal Director & HOD Internal Medicine, Max Super Speciality Hospital, told HealthandMe.

She urged people to "watch for warning signs like dizziness, rapid heartbeat, nausea, or confusion, and move to a cool area immediately if they appear—seek medical help for severe symptoms. Keep homes cooler by closing curtains during the day and opening windows at night".

How To Stay Safe

• Stay well-hydrated by drinking plenty of water
• Avoid caffeine
• Avoid stepping out during peak afternoon hours
• Wear light, loose, and breathable clothing,
• Use protective gear like caps or umbrellas when outdoors
• Avoid excessive physical activity in the sun.
• Never leave children or elderly individuals in parked vehicles. Include fruits and fluids in your diet to maintain electrolyte balance.
• If you experience dizziness, headache, or fatigue, seek medical attention promptly, as early care can prevent serious complications.

More than 3 million eye drops have been recalled by the US Food and Drug Administration (FDA) over sterility concerns.

The FDA, in its Enforcement Reports, stated that the products recalled “lack assurance of sterility.”

While so far, there are no reports of injuries associated with the eye drops, the FDA notice classified the action as a “Class II recall.”

Class II recalls apply to products that can cause “temporary or medically reversible” health problems.

The 3,111,072 products were manufactured by California-based K C Pharmaceuticals and were sold under names such as “Dry Eye Relief Eye Drops,” “Sterile Eye Drops,” and “Artificial Tears Sterile Lubricant Eye Drops,” according to the FDA notice.

California-based K C Pharmaceuticals made the voluntary recall of the eye drops in early March.

The eight types of eye drop products were sold at major retailers, including CVS, Walgreens, and Rite Aid. They have expiration dates ranging from April to October.

Eye Drop Recall: Implications For Patients

“The recall is very large, potentially affecting over a million people,” said C. Michael White, clinical pharmacologist and pharmacist at the University of Connecticut, in a Commentary published in The Conversation.

He added that “using nonsterile eye drops that harbor bacteria and fungus can cause eye infections, which can become severe because the immune system has a hard time accessing the eyeball and fighting the microbes”.

However, other experts stated that infections from eye drops are rare. Notably, the current voluntary recall has not reported any infections to date.

According to Jeffrey H. Ma, an ophthalmologist at the University of California-Davis Health, people with dry eyes must use preservative-free drops that come in disposable single-use vials. He advised people to dispose of any eye drops included in the recall.

“Drops that are not on the recall list should be safe to use,” said Ma. “If you have any of the drops on the list, you should immediately throw them away.”

How To Avoid Common Eye Infections

Beyond contaminated eye drops, several common eye infections can be triggered by environmental factors such as sun exposure, dust, and dirt—especially among people who work outdoors or spend long hours in front of screens.

“Conjunctivitis, known as pink eye, is the most common type of eye infection,” Ma said. Pink eye is estimated to affect about six million people every year.

“It is usually viral or bacterial, and is transmitted through direct contact, such as touching or rubbing your eyes after touching a contaminated item,” Ma added.

Contact lens wearers also have a higher risk of eye infections, particularly if they sleep in their lenses.

Symptoms of an eye infection include:

• blurry vision
• discharge
• pain or discomfort
• redness of the eyelid or eye
• feeling like there is something in the eye
• increased sensitivity to light

Experts urged investing in good sunglasses with ultraviolet protection and maintaining proper hygiene, such as washing hands before touching the lenses.

"For those who are using computers a lot, you need to blink your eyes constantly, take breaks in between, and drink a lot of water. Dehydration is also a contributing factor to dry eye," Dr Anita Sethi, who is Principal Director and HOD Ophthalmology, Max Multi Specialty Centre at Panchsheel Park.

She also recommends using zero-number protective glasses and computer glasses that can decrease strain and dry eye.

While advising people to stay away from natural remedies like turmeric or ginger put inside the eye, Dr Sethi urged people to consume more “foods rich in vitamin E, antioxidants” to maintain eye health.

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.