In the aftermath of a global pandemic, with the memory of oxygen shortages still fresh and the threat of new infectious diseases looming large, the world's healthcare systems are stretched thinner than ever. We're battling overlapping health crises- resurging malaria and dengue cases, the global spread of West Nile virus, new strains of flu, antibiotic-resistant infections, and a growing mental health epidemic. Public health is in constant firefighting mode but there is one quiet casualty of this mad world that seldom hits the headlines—our blood supply.

Blood—so simple, so essential—lies at the very center of modern medicine. Whether it's stabilizing a trauma victim, sustaining a cancer patient through chemotherapy, or enabling women to survive complicated delivery, the presence of safe, screened, and timely blood transfusions is not negotiable. And yet, today, that lifeline is being quietly and methodically disrupted.

As global warming picks up, it is progressively eating away at all levels of the blood supply chain—donor health to storage conditions to transportation logistics. Intense heatwaves deter donors, electricity failures weaken storage refrigeration, and flooding or forest fires slow blood unit delivery. Insects that transmit blood-borne illnesses such as dengue and West Nile virus are spreading to new areas as a result of altered weather patterns, complicating and accelerating blood screening. In short, what was once a relatively predictable system is now under attack from unpredictable climatic events.

This isn't a remote threat—it's occurring today. A recent study in The Lancet Planetary Health cautions that climate change may compromise the safety, adequacy, and availability of blood supplies around the world. Investigators have demanded proactive measures: additional mobile and versatile blood collection units, enhanced disease monitoring, and global cooperation to maintain resilience against environmental shocks.

Behind all the science and statistics stands a human narrative: a father in need of blood following a car accident, a child with sickle cell disease, a pregnant woman. Their lives are not only dependent upon donors, but upon a system powerful enough to withstand the floods—literally.

As the planet's climate crisis gains speed, its effect is no longer limited to melting glaciers or sea level rise—it now runs in our veins, literally. The integrity of the global blood supply is becoming a vital, under-covered casualty of global warming. With millions depending on secure blood transfusions for surgeries, trauma, cancer treatment, and the control of chronic disease, interruptions to the blood supply chain can be disastrous for public health systems globally.

From shifting donor supply to jeopardizing storage and transportation logistics, climate change is quietly mounting pressure on every step along the blood supply chain and with the planet warming up, so does the imperative for health systems to do the same.

Blood is the foundation of emergency care and chronic patient management. Over 25 million units of blood are transfused every year in Europe alone, treating victims of accidents, premature babies, and patients with diseases such as sickle cell disease and cancer but providing a steady, clean supply of blood involves a precarious balance of infrastructure, logistics, and volunteer donors.

This equilibrium is increasingly disrupted by climate-related disturbances—severe heat, floods, storms, and disease outbreaks—that affect everything from donor engagement to safe blood transportation and storage.

How Climate Events Disrupt the Blood Supply?

Severe weather events like hurricanes, floods, wildfires, and heatwaves are becoming more frequent and intense, directly impairing the capacity to obtain, test, store, and distribute blood products. Such events can physically destroy facilities, restrict staff and donor mobility, or lead to spontaneous spikes in demand because of injury.

Natural disasters not only disrupt transportation and storage but also reduce the pool of available donors, said Red Cross Lifeblood and University of the Sunshine Coast (UniSC) Australian Australia's Dr. Elvina Viennet. "These events upset the storage, safety, and transport of blood, which has a limited lifespan," she said.

The effect is not hypothetical; when hurricane Harvey struck in the US, for example, hundreds of blood drives were canceled, creating regional shortages. In these emergencies, there is frequently a simultaneous and urgent rise in demand for blood and fall in supply—a health system's worst nightmare.

Increased rainfall and global warming have pushed the geographical limits of vector-borne illnesses such as dengue, malaria, and West Nile virus—some of which are transmissible through blood. Ideal breeding conditions for mosquitoes are promoted by warmer climates, which makes transfusion-transmissible infections (TTIs) a matter of concern.

"Climate change could affect some blood-borne infectious diseases that can exclude individuals from donating," Viennet said. This complicates and costs more to screen blood, overloading already stressed health systems.

Europe has already seen an increase in dengue cases previously unusual in the region illustrating the speed at which new threats are arising because of changes in the environment.

Donor Health and Availability in a Changing Climate

Aside from infectious diseases, climate change can also have a direct impact on donor health. Heat, air pollution, dehydration, and cardiovascular stress can decrease the number of eligible donors. Even minor physiological changes—such as changes in haemoglobin levels due to heat—can disqualify donors.

There is also a mental health angle to consider where climate anxiety, post-disaster trauma, and stress from displacement can reduce donor participation. The study pointed to increased anxiety and depression among both donors and healthcare workers in the aftermath of extreme weather events.

As climate change worsens chronic conditions—specifically cardiovascular and respiratory disease—it also raises demand for blood transfusions. Complications of pregnancy, sickle cell crises, and surgeries can become more common, adding demand-side pressure to blood banks.

This combined risk of dwindling supply and escalating demand is not abstract; it's already materializing. Left unchecked, health systems could soon experience catastrophic care gaps.

Ways to Protect Blood Supplies in a Warming World

To combat this impending crisis, scientists and policymakers recommend a multi-faceted strategy:

• Mobile and flexible blood donation facilities that can function during and after severe weather conditions.
• Global cooperation to exchange blood supplies across borders during scarcity.
• Research investment to learn how climate factors affect donor health and blood stability.
• Implementation of cell salvage methods (autotransfusion) in operating rooms to minimize dependence on external blood supply.

Increased diversity donor recruitment, particularly from migrant communities, to more closely match rare blood groups and meet altered demographics.

As UniSC's Dr. Helen Faddy pointed out, "With sea levels rising and migration rates growing, it's critical to have a greater number of blood donors from diverse ethnicities."

The blood supply is not only a technical problem—it's a human one. While climate change continues to test the world's health systems, protecting our blood supply has to be an absolute priority. The danger is multiple- biological, logistical, psychological, and infrastructural like the climate crisis itself, it requires global action, scientific innovation, and urgent, sustained effort.

Each year, hundreds of people around the world lose their lives waiting for a life-saving organ transplant. The demand for organs far outweighs the supply, leaving many patients with little hope. But what if we could print organs—tailor-made for each patient—using their own cells? While we're not quite there yet, researchers are making significant strides in this futuristic field known as 3d bioprinting.

Though the technology is still far from clinical trials, scientists believe that when 3d-printed organs become a medical reality, the process will likely involve a blend of cutting-edge imaging, personalised cell harvesting, and highly advanced bioprinting methods. Here's what this groundbreaking process could look like.

Step 1: Creating a Personalised 3D Model

To print a functional organ, the process begins with creating a precise 3D blueprint. While generic models can serve as a starting point, personalisation is key. Using imaging technologies like MRI (Magnetic Resonance Imaging) and CT (Computed Tomography) scans, medical professionals can generate a detailed digital model of the organ tailored specifically to the patient’s anatomy. This personalized design enhances the chances of a successful transplant by ensuring the printed organ will fit and function properly in the recipient’s body.

Step 2: Collecting Patient’s Cells And Preparing Bioink

One of the biggest hurdles in organ transplantation is rejection, which happens when the recipient’s immune system attacks the new organ. To reduce this risk, scientists aim to use the patient’s own cells to build the organ. These cells are harvested, cultivated in labs, and combined with a specially designed “bioink”—a gel-like substance engineered to mimic the structure of natural tissues. This bioink becomes the medium through which living cells can be precisely layered and formed into complex biological structures.

Step 3: Printing the Organ

With a personalized 3D model in hand and a supply of bioink rich in the patient’s cells, the actual printing process begins. The organ is built layer by layer, using bioprinters designed to handle delicate biological material. Some methods involve extrusion-based bioprinting, which pushes the bioink through a nozzle to form a structure, similar to how icing is piped onto a cake. Other techniques rely on light-based bioprinting, which uses beams of light to shape the biomaterial with incredible precision.

In some cases, additional cells may be added to the organ after printing to support its development or enhance functionality. Although the exact tools and materials are still being refined, technologies such as the BIO X, BIO X6, and LUMEN X are among those helping to push the boundaries of what’s possible in tissue engineering.

Road Ahead

While researchers are still navigating numerous scientific and ethical challenges, the vision of printing fully functional, transplantable organs is no longer science fiction. With continued innovation and global collaboration, 3D bioprinting could one day eliminate organ shortages altogether, saving countless lives and revolutionizing modern medicine.

In a world where superfoods, supplements, and scientific advances define the health discourse, María Antonia Cuero's story shines for its elegant simplicity. At 123, María is officially the world's oldest living human—informally surpassing the Guinness World Record holder, France's Jeanne Louise Calment, who reached 122 years of age. Though her age remains in process of verification, the insights she offers are incontrovertibly priceless and scientifically validated.

Born on October 18, 1901, in Colombia, María has witnessed two world wars, numerous technological revolutions, and the dawn of modern medicine. Yet when asked what the secret to her remarkable longevity is, María doesn't refer to a magic pill or a genetic mutation. Rather, she attributes her longevity to two humble foods: fish and bananas—cornerstones of her daily diet, steeped in her coastal upbringing.

Growing up in a big family of 10 siblings by the Mayorquín River, María spent her days surrounded by nature. With fresh fish and tropical fruits readily available, her childhood diet was both organic and full of nutrients—years before these words became health buzzwords. Throughout the decades, she also raised eight children and is now the proud matriarch to 26 grandchildren, 24 great-grandchildren, and 54 great-great-grandchildren.

Although not officially documented by the Guinness World Records, María's identification card in 2012 indicates her birth as October 1901. She became the oldest to get vaccinated in March 2021, at 119 years old, marking yet another incredible achievement to her name.

However, aside from age and figures, it is María's way of living and attitude that provide deep insights into longevity.

Maria's Mindset and Philosophy of Longevity

In an interview on the Colombian television show Los Informantes, María discussed her philosophy of life: laugh frequently, don't worry excessively, remain active, and don't sit around too much. In her opinion, physical activity is essential. Her regimen included walking often, swimming, rowing, and being outdoors—long before fitness monitors or gym memberships were the rage.

These principles echo research in contemporary gerontology. Many studies identify an active life and good social relationships with a lower risk of chronic disease and longer lifespan. María's case supports that emotional well-being, combined with activity, is significant in healthy aging.

Fish

Of all the foods that she ate, fish is what María puts so much stress on. Living next to the river as a child, not only was she afforded the fresh catches each day, but she fished herself very frequently. "Good fish. I would fry the fish and then mix it with coconut and rice," she shared with a journalist.

Fish is a good source of high-quality protein, omega-3 fatty acids, vitamins D and B2 (riboflavin), and minerals like calcium, phosphorus, iron, zinc, iodine, magnesium, and potassium. Omega-3s in oily fish, particularly docosahexaenoic acid (DHA), are recognized to lower inflammation, maintain brain health, and decrease the risk of heart disease.

Scientific studies in the Journal of the American Medical Association have indicated that individuals with high levels of omega-3s live as much as 2.5 years longer on average. Another significant study identified a 40% lower risk of coronary heart disease mortality in those who ate regularly from fish with high levels of omega-3s, a figure further supported by the British Heart Foundation.

Bananas

María's second pillar of diet? Bananas—the smaller, sweeter bocadillo bananas (also referred to as sugar bananas or lady finger bananas). These bite-sized fruits are not only tasty but are full of fiber, antioxidants, potassium, and vital vitamins.

Bananas have been valued for centuries for their digestive and cardiovascular benefits. They help to control blood pressure, balance body fluids, and repair muscle and nerve tissue—all highly beneficial for elderly populations. The tryptophan and vitamin B6 contained in bananas also assist with serotonin formation, the "feel-good" neurotransmitter that enhances emotional well-being.

For María, these bananas were an everyday treat. And as science indicates, eating bananas on a regular basis can help with heart health, boost mood, and assist with muscle recovery.

What We Can Learn From Her Habit?

María's remarkable life is not merely about what she ate—it's about the regularity with which she lived. Her life was based on balance: a modest diet, regular exercise, a positive attitude, and close family ties. To this day, she radiates resilience. When asked what she is afraid of, her answer was moving: "I am not afraid of anything anymore."

This lack of fear and deeply ingrained calmness may also have protective health benefits. Studies have linked chronic stress to increased inflammation and a heightened risk of age-related diseases. María’s philosophy—“don’t worry too much”—may offer more protection than we’ve previously realized.

As the world population ages, María Antonia Cuero's life is an eloquent reminder: the route to longevity may not come in the form of costly therapies, restrictive eating, or vigilant self-tracking. It may sometimes be found in age-old secrets—eat fresh, move frequently, laugh without restraint, and enjoy the little things.

As we wait for official verification of her record-setting age, her legacy already walks tall as an example of how simplicity, persistence, and culture can overcome and thrive. In a world filled with constantly changing health fads, María's legacy encourages us to stop for a moment and ask—what really counts when it comes to living a long, healthy life?

Microplastics—those invisible particles of plastic pollution—may be doing more than just contaminating the environment. According to recent findings presented at the American Heart Association (AHA), they could also be silently contributing to clogged arteries, potentially raising the risk of heart attacks and strokes.

In a study that’s turning heads in the medical community, researchers discovered that fatty plaques found in neck arteries—known as carotid arteries—contained over 50 times more microplastic content compared to plaque-free arteries. Even more concerning, these microplastic concentrations were found to be significantly higher in individuals who had already suffered from a stroke, mini-stroke, or temporary vision loss caused by restricted blood flow.

What Exactly Are Microplastics?

Microplastics are extremely small particles—often less than five millimeters in size—created when larger pieces of plastic break down. They can enter the human body in multiple ways: through the air we breathe, the food we eat, and even skin contact. An even smaller subset, known as nanoplastics, measures under 1,000 nanometers and is completely invisible to the naked eye. Because of their minuscule size, these particles can infiltrate tissues, organs, and potentially disrupt biological functions.

The accumulation of microplastics in arterial plaques introduces a new dimension to the ongoing conversation about cardiovascular risk factors. While high cholesterol, smoking, and hypertension remain the usual suspects, environmental pollutants like microplastics are emerging as a stealthy but significant threat.

A Simple Solution In Your Kitchen?

Amid growing concerns about microplastic contamination, especially in drinking water, scientists have been working on practical ways to mitigate exposure. In 2024, a research team from Guangzhou Medical Centre made a breakthrough. They discovered that a common household activity—boiling water—can significantly reduce microplastic content in tap water.

According to the team, combining boiling with basic filtration can remove up to 90% of nanoplastic and microplastic particles (NMPs) from household water. However, the method’s effectiveness varied depending on the type of water used. In areas where tap water contains higher mineral content, commonly referred to as "hard water," the technique proved especially efficient.

The secret lies in limescale. As hard water is heated, it forms limescale—a chalky white substance—which appears to create a sticky layer that traps microplastic fragments. Researchers found this natural process enhanced the removal of plastic particles from water, offering a practical and affordable solution for most households.

While more research is needed to fully understand the long-term health effects of microplastics, early evidence suggests they may be more dangerous than previously thought—especially for cardiovascular health. Taking simple precautions, such as boiling and filtering drinking water, could help reduce exposure and offer a small but meaningful step toward safeguarding your heart and overall well-being.