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.

A recent report by the Comptroller and Auditor General of India (CAG) found E. coli bacteria in drinking water from water coolers at several major railway stations across the country.

The report also flagged unhygienic conditions in railway washrooms and other passenger amenities. The audit found that 458 of the 512 stations examined — more than 89 per cent — did not meet prescribed standards for minimum essential amenities.

"Bacteriological analysis of drinking water was not carried out at 59 stations over six zones," the CAG said in its report, Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways, tabled in Parliament on August 12.

Water samples from coolers tested positive for E. coli at two stations in Southern Railway, one in South Central Railway, four in Central Railway and one in Eastern Railway.

The report also found total coliform bacteria, including E. coli, in tap water samples collected from platforms at several stations during 2022-23 and 2023-24.

Following the findings, Railway Minister Ashwini Vaishnaw has directed immediate steps to improve the safety of drinking water at stations.

The Railway Ministry said a new "tank-to-tap" filtration system would be installed at around 20,000 locations, including water coolers. The measures include replacing water tanks, regular water-quality testing at source and outlet points, centralized monitoring, accountability, and scheduled cleaning and maintenance of storage tanks.

Also read: Does Sunscreen Really Raise Skin Cancer Risk? What The 470,000-Person Study Found

What Is E. Coli?

Escherichia coli, commonly known as E. coli, is a group of bacteria that normally lives in the intestines of humans and animals.

HealthandMe spoke to Dr. Pawan Kumar Goyal, Senior Director - Internal Medicine, Fortis Hospital, Shalimar Bagh, about E. Coli infection, its symptoms and how to prevent it.

Dr. Pawan Kumar Goyal explains, "Most E. coli strains are harmless and are part of the normal bacteria present in the gut. However, some strains can cause infections, particularly when they enter the body through contaminated food or water."

What Happens During an E. Coli Infection?

Dr. Goyal says, "The presence of E. coli in drinking water is an important indication of faecal contamination. It suggests that the water may have come into contact with human or animal waste and may contain other disease causing organisms as well."

Harmful E. coli strains most commonly affect the digestive system, causing diarrhea, abdominal pain, and gastroenteritis. Some strains can also cause urinary tract infections.

Certain strains produce Shiga toxin, which can cause serious complications, including kidney damage, particularly in children and older adults.

Common Signs of E. Coli Infection

Symptoms can vary depending on the strain and the part of the body affected. Dr. Goyal says the common gastrointestinal symptoms include:

• Diarrhoea, which may sometimes be severe or contain blood
• Abdominal cramps and pain
• Nausea and vomiting
• Fever and weakness
• Reduced appetite

Watery diarrhea is often one of the earliest symptoms of E. coli infection of the gastrointestinal tract.

Read More: Amid Cyclospora, Salmonella Outbreaks, US FDA Issues Guidance on Ready-to-Eat Produce

Treatment For E. Coli

Talking about the treatment for E. Coli infection, Dr. Goyal explains, "Treatment depends on the strain of E. coli and the severity of infection. Adequate fluids and electrolytes are important in most cases. Antibiotics are not appropriate for every E. coli infection and should only be taken following medical assessment, as certain infections may worsen with inappropriate antibiotic use."

Not every E. Coli infection turns severe. However, certain symptoms must be addressed clinically as they could lead to complications.

Dr. Goyal says, "For most healthy adults, the infection may settle with appropriate fluid replacement and supportive care. However, severe diarrhoea can cause dehydration, which can become dangerous if not treated in time."

The expert also spoke about serious complications from E. Coli infection that could lead to renal damage.

He says, "Certain E. coli strains can also cause haemolytic uraemic syndrome, a serious complication that can affect the kidneys.

The expert also said that young children, older adults and people with weakened immunity may be at greater risk of complications.

He adds, "Persistent diarrhoea, blood in stools, high fever, reduced urination, dizziness or signs of significant dehydration require prompt medical attention. Early recognition and appropriate treatment can prevent complications."

How To Protect Yourself From E. Coli?

E. coli can spread through contaminated food, water and fecal matter. Basic hygiene and safe food practices can help reduce the risk.

Dr Goyal recommends, "Prevention depends largely on maintaining good hygiene and ensuring access to safe drinking water. Hands should be washed thoroughly before eating and after using the toilet. Water from an uncertain source should be avoided, and properly treated or boiled water should be used where safety is in doubt."

Other preventive measures include:

Maintain Hand Hygiene: Wash your hands with soap and water for at least 20 seconds before eating or cooking and after using the toilet, changing diapers or handling animals.

Practice Safe Food Handling: Keep raw meat separate from ready-to-eat foods. Use separate utensils and cutting boards, and clean kitchen surfaces thoroughly after handling raw meat.

Cook Food Thoroughly: Cook ground meat to at least 160°F (71°C) and poultry to 165°F (74°C). A food thermometer can help ensure food reaches a safe temperature.

Wash Fruits and Vegetables: Wash produce under running water before eating, even if you plan to peel it.

Choose Safe Drinking Water: Drink pasteurized milk and juices and use boiled or treated water. Avoid unpasteurised products and untreated water, which can carry harmful E. coli strains.

Tennis legend Novak Djokovic has opened up about a longstanding health issue he has been dealing with for years.

At the Cincinnati Open, the Serbian, who holds the all-time men's record of 428 weeks as world No. 1 in singles, struggled physically throughout his second-round match.

The 39-year-old was seen crouching on all fours between points, required a medical timeout and appeared to vomit into towels as extreme heat and humidity took a toll.

The 24-time Grand Slam champion suffered a surprising second-round defeat, losing to Argentina's Thiago Agustín Tirante 2-6, 6-4, 6-4.

What Health Issue Does Novak Djokovic Have?

Following the defeat, Djokovic revealed that he has been dealing with a longstanding health condition that becomes particularly difficult to manage in hot and humid conditions.

"It's because of a health issue I have," Djokovic told reporters after the match. "I've been dealing with it for many years now. It causes me a lot of problems, especially when there's a lot of humidity and heat."

Djokovic said he had anticipated difficult conditions in Cincinnati, but the combination of heat, humidity, nerves and other factors ultimately made the situation worse during his match against Tirante.

His physical struggles also raised questions about his future at the Cincinnati Open. Asked whether he planned to return to the tournament in 2027, Djokovic gave an uncertain response.

"I certainly hope so, but unfortunately, at this point it seems more likely that I won't. However, we'll see what the future holds."

Novak Djokovic's Previous Health Issues and Injuries

Djokovic has dealt with several injuries and health challenges throughout his career.

• Respiratory issues: Before 2010, Djokovic faced heat exhaustion, breathing difficulties and physical collapses. He later changed his diet after identifying gluten and dairy intolerance.

• Elbow injury: Chronic right elbow problems led to surgery in 2018.

• Abdominal tear: He played through an abdominal tear to win the 2021 Australian Open.

• Hamstring injury: He battled a left hamstring injury during his 2023 Australian Open title run.

• Knee injury: A torn meniscus forced him to withdraw from the 2024 French Open.

Djokovic on the Physical Demands of Ageing

In 2023, Djokovic acknowledged that his body was beginning to feel the effects of a long career, although he still felt he had fuel left in the tank.

"I am being completely honest with you guys. I have asked this question also, but it's not like I think about it all the time.

The desire is still there, but things can change quickly – I am 36, I've been a pro for 20 years."

He said he did not view age as a decisive factor, instead focusing on his overall physical condition and whether he continued to enjoy playing.

Age can affect tennis performance through changes such as reduced muscle mass, slower recovery and lower aerobic capacity, which can also increase injury risk. However, modern sports science and tactics can help players remain competitive as they age.

Research suggests that people who regularly play tennis may add nearly 10 years to their lives, potentially outperforming the longevity gains associated with several other sports.

"Tennis is a sport that is unique because people of all ages play it, from age two to 92 or older, and that makes it accessible to a lot of people," Dr. Melissa Leber, director of emergency department sports medicine at Mount Sinai Health System, told the New York Post.

The Ebola outbreak in the Democratic Republic of Congo (DRC) has become the deadliest one in the country’s history, with the death toll reaching 2,325, according to the latest reports.

The number has now surpassed the 2,299 deaths recorded during the 2018–2020 Ebola outbreak, which had previously been the country’s worst. The current outbreak has also become the largest in the DRC by number of confirmed cases, with 4,945 infections recorded so far.

The latest figures indicate that the outbreak has reached another grim milestone just three months after it was officially declared on May 15.

Ebola Is Spreading Rapidly

The DRC’s National Public Health Institute reported 101 new confirmed cases in the 24 hours leading up to its latest update, highlighting how quickly transmission is continuing.

The outbreak was first detected in Ituri province, but the virus has since spread to six provinces, including North Kivu, South Kivu, Haut-Uele, Tshopo and Bas-Uele. More than 3,400 cases have been reported in Ituri alone.

The United Nations has described the outbreak as the fastest-growing Ebola epidemic on record.

“Ebola is winning in the Democratic Republic of the Congo. We cannot let the virus outrun our response,” UN humanitarian chief Tom Fletcher said, calling for “speed, scale, and solidarity” before the outbreak gets even further ahead of containment efforts.

Also read: Ebola Outbreak Is Claiming 1 Life Every 30 Minutes In DR Congo: UN Humanitarian Official

The Most Deadly Outbreak

One of the biggest reasons behind rapid transmission is that people are still being diagnosed too late. Thomas Parisch, a public health specialist with Médecins Sans Frontières, said that normally the proportion of people dying should fall as outbreaks progress because contact tracing improves and patients receive treatment earlier.

“Instead, we're still seeing many cases detected very late,” he said, with some infections only being identified after patients have died in their communities.

The case-fatality ratio has climbed from around 20% in early June to approximately 46%, according to Reuters.

That does not mean the virus itself has become more lethal. Rather, the increase is a warning that many patients are reaching healthcare facilities too late for treatment to be effective.

Also read: Ebola 2026 Outbreak Spreading Faster Than Any Before, On Track To Become Deadliest: WHO Chief

No Approved Vaccine

The current outbreak is being caused by the Bundibugyo species of Ebola, a relatively rare strain.

Unlike the Zaire species responsible for several previous major Ebola outbreaks, Bundibugyo currently has no approved vaccine or specific treatment. WHO says experimental vaccines and treatments are being investigated, but they remain under evaluation.

This makes early diagnosis, isolation, contact tracing and supportive medical care particularly important.

The outbreak is also unfolding in an extremely difficult environment. Conflict, population movement, weak healthcare infrastructure, misinformation and shortages of resources are making it harder for health teams to identify and isolate infections quickly. Health workers have also demonstrated strikes due to unpaid wages.

Also read: Amid Rapidly Expanding Ebola Outbreak, DR Congo Is Seeing An Alarming Increase In Maternal Deaths; Here's Why

Efforts Towards Containing The Outbreak

Despite the challenges, WHO chief Dr Tedros Adhanom Ghebreyesus said significant progress has been made towards containing and eradicating the virus. It includes:

• More than 21,000 community health workers have been trained.
• Treatment centres, safe burial teams, laboratories and community engagement teams are operating across the affected provinces, reaching hundreds of thousands of people.
• A total of 886 patients have recovered, even without specific therapeutics and vaccines, which are progressing through trials.
• For the first time, two vaccines specifically designed against Bundibugyo virus have entered Phase 1 safety trials in humans.
• Two new animal studies of a vaccine against Zaire ebolavirus — the more common species — have shown promising evidence of cross-protection in animals, Tedros said.