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The Pavlovian Paradox: Mosquitoes Learn to Associate DEET with FoodFor decades, the efficacy of DEET (N,N-diethyl-meta-toluamide) has been attributed solely to its chemical properties, which are believed to either repel insects or block their ability to detect humans. However, a new study led by Professor Claudio Lazzari from the University of Tours suggests a more complex behavioral interaction. The research indicates that mosquitoes can learn to associate the scent of DEET with the presence of a blood meal, effectively turning a repellent into a lure through a process similar to Pavlovian conditioning.Experimental Evidence: From Repellent to LureThe study, published in the Journal of Experimental Biology, involved trapping mosquitoes and presenting them with warm blood that was just out of reach. The insects were simultaneously exposed to DEET. The results demonstrated a significant shift in behavior:Trained Group: 60% of mosquitoes that fed while exposed to DEET subsequently attempted to bite when exposed to the repellent alone.Control Groups: Significantly lower percentages were observed in untrained insects (17%) and those with prior exposure to DEET alone (13%).In a real-world test, nearly 60% of the trained mosquitoes attempted to bite a researcher's DEET-treated hand, whereas untrained mosquitoes universally targeted the untreated hand.Redefining Insect Control StrategiesThis discovery represents a significant shift in our understanding of how repellents work. It suggests that the reaction to DEET is not merely a chemical aversion but can be modified by experience. Experts, including Dr. Nina Stanczyk of ETH Zürich, emphasize that while the learning ability of mosquitoes is impressive, the implications for public health are nuanced. The study highlights that repellents may function differently depending on the context of the mosquito's previous interactions with humans.Future Outlook for TravelersDespite the alarming findings, experts urge travelers not to abandon DEET. The consensus is that this phenomenon occurs under specific laboratory conditions and is unlikely to happen frequently in the wild due to the variability of repellents encountered during different blood meals. The key takeaway for the future is the importance of consistent application. As noted by the researchers, the risk of association is highest when the repellent starts to wear off, reinforcing the need for regular reapplication to maintain protection.

The Rise of Nigeria's Digital Herbal Marketplace In Abuja, Nigeria, Oke Bola thought a fertility supplement she found online might help her conceive. Instead, within days of taking it, she struggled to breathe. Her experience reflects a growing online trade in unverified herbal remedies promoted across social media platforms. Bola, who is in her early 40s and has never had children, bought the supplement earlier this year and increased the recommended dosage, hoping for quicker results after hearing about it from friends and family. "I recognised the symptoms of asthma; the wheezing sound at night was familiar," she told Al Jazeera. "When I checked online, I realised it could be from the herbal medication." Her experience is not isolated. Across Nigeria, doctors and pharmacists report a surge in social media-driven self-medication, particularly involving unverified herbal products. This trend is worsening health outcomes, delaying treatment, and adding pressure to an already strained healthcare system serving about 230 million people. Nigeria's young, hyperconnected population increasingly uses digital platforms for health information and advice. But that access has also created what Dr Isaac Kolawole and Dr Fidelis describe as an "algorithmic apothecary" – an unregulated online marketplace where influencers and anonymous sellers promote remedies directly to consumers with little or no scientific backing. Health Impacts of Unverified Herbal Remedies Within this ecosystem, herbal remedies, long part of Nigeria's medical and cultural landscape, are increasingly repackaged as miracle cures, sometimes with dangerous consequences. Doctors report more patients arriving at hospitals only when their conditions have significantly worsened, often after prolonged use of unverified treatments. A consultant nephrologist at the University College Hospital in Ibadan, Dr Yemi Raji, said herbal medicine continues to play a role in kidney disease cases in Nigeria. "When you take herbal medication, you are taking both the good and the bad," he said. "Patients often arrive late, when treatment is more difficult and expensive." Dialysis alone can cost between 50,000 and 100,000 naira ($36-72) per session, several times a week. Studies link herbal use to kidney and liver disease cases across Africa, including findings that about 46 percent of liver disease admissions in one Nigerian hospital involved herbs or roots. A 2022 study found that 76.65 percent of participants had used herbal medicine, with more than a third combining herbal and conventional treatments while 82.44 percent did not inform their doctors. The Algorithmic Amplification Effect On a smartphone screen, relief is just a click away: fertility tonics, eye drops promising restored vision, syrups claiming to "flush out" disease. The advertisements are polished, persuasive and constant, woven into TikTok, Facebook, Instagram and X feeds. "The platforms themselves amplify this effect," said Dr Egemba Chinonso Fidelis, a public health advocate known online as Aproko Doctor. "Their algorithms reward engaging content and push it to wider audiences." Even users who try to avoid such content often encounter it repeatedly, shaped by emotional storytelling, music and urgency-driven messaging. A 2025 Nigeria-based study on Jinja Herbal Mixture found it appeared safe for short-term use within tested dosage ranges, but researchers recorded biochemical changes at higher doses, including altered creatinine and sodium levels in test subjects, signs of possible kidney and liver stress. The study called for further research into long-term effects and interactions with conventional medicines. Regulatory Challenges in the Digital Age The National Agency for Food and Drug Administration and Control (NAFDAC) says it is working to track unregistered manufacturers, but enforcement remains difficult, especially online. "With the sheer volume of products online, enforcement has limited reach," said Isaac Kolawole, the southwest zonal director of NAFDAC. Many sellers use fake or incomplete addresses, making them difficult to trace. NAFDAC requires strict registration, testing and approval before herbal products can be sold or advertised, but regulation has not kept pace with online commerce. Fidelis argued that stronger regulation alone is not enough. "If there are no consequences for lying about healthcare online, people will keep doing it," he said. He noted that scammers have even used AI-generated versions of his image to promote fake products. "Real medicine does not promise to cure everything, and it does not rely on countdowns," he added. "Scammers do." Path Forward for Safer Digital Health As Nigeria's digital economy expands, the intersection of technology and healthcare will only grow more complex. Fidelis stressed that access to affordable healthcare must improve, public trust must be rebuilt, and digital platforms must take responsibility for the health content they amplify. Pharmacist Akinade Akinlolu noted that while conditions like diabetes and hypertension can be managed, online claims often suggest cures. "Economic pressure is also pushing people towards cheaper or 'miracle' alternatives," he added. "Without stronger safeguards," Fidelis warned, "the algorithmic apothecary will continue to grow and put more people at risk." The challenge for Nigeria's healthcare system is to harness the power of digital platforms while ensuring they promote evidence-based care rather than potentially harmful alternatives.

The Failure of US Garbage Incinerators The nation's garbage incinerators are largely failing to eliminate Pfas 'forever chemicals' air pollution, and are putting people in largely low-income neighborhoods at risk, public health advocates and independent experts warn. The Industry's Misleading Claims A new industry trade group report alleges Minnesota's incinerators are reducing their forever chemical emissions by 99.6%. However, experts say the report is full of bad assumptions, incomplete data, and misleading language. The Health Risks of Pfas Pollution Pfas are a class of at least 16,000 compounds that have been linked to cancer, birth defects, decreased immunity, high cholesterol, kidney disease, and a range of other serious health problems. They are dubbed 'forever chemicals' because they do not naturally break down in the environment. The Impact on Low-Income Neighborhoods The incinerators are often located in low-income neighborhoods, putting vulnerable populations at risk. 'This trash becomes the problem of the poor and marginalized to deal with in their bodies,' said Nazir Khan, executive director of the Minnesota Environmental Justice Table. The Need for Stricter Regulations Experts say that stricter regulations are needed to address the issue of Pfas pollution. 'I'm not aware of any industrial-scale commercial incinerator that solves this problem,' said Michael Youhana, an attorney with the non-profit Earthjustice.

The Lead Voting has begun in Malta's snap parliamentary election, which will determine who governs the Mediterranean island nation for the next five years. Malta's Snap Election Underway Polling stations opened on Saturday in a contest widely viewed as a two-horse race between the governing Labour Party and the centrist Nationalist Party. Prime Minister Robert Abela, who leads the Labour Party, called the election a year ahead of schedule against the backdrop of the Iran war, which is impacting markets globally. Economic Concerns Dominate the Election The economy is set to dominate this year's election, with rising rents and ailing infrastructure at the forefront of many voters' minds. Malta's public health service is also under increasing pressure following a population surge in what is already the European Union's smallest and most densely populated country. The Impact of Past Events The election takes place under the shadow of the assassination of investigative journalist Daphne Caruana Galizia, who was killed by a car bomb in 2017. Caruana Galizia exposed corruption in Malta, with her death ultimately leading to the resignation of former Prime Minister Joseph Muscat. The Future Outlook Opinion polls suggest Abela's party is on course to win the snap election, with Labour dominating Malta's political landscape during the past decade. However, the Nationalist Party's new leader, Alex Borg, hopes to unseat Labour and become Malta's youngest-ever prime minister at the age of 30. Election results are expected to be announced at about midday on Sunday.

Lead: Sleep Deprivation Emerges as a Possible Driver of Early-Onset CancerResearch presented at the American Society of Clinical Oncology’s annual meeting in Chicago suggests that irregular sleeping patterns could be a significant, yet modifiable, risk factor for cancers diagnosed before age 50.The Study Linking Sleep Disruption to Early-Onset CancerTwo investigations led by MD Anderson Cancer Center analysed health records of over 18 million U.S. adults aged 18‑50. Participants with chronic insomnia showed a markedly higher incidence of bowel, breast, uterine, and ovarian cancers compared with well‑rested peers.Key Numbers Highlight the Scale of the IssueGlobal early‑onset cancer cases rose from 1.82 million (1990) to 3.26 million (2019), an 80% increase in three decades.Cancer deaths among people in their 30s, 40s, or younger climbed 27% over the same period.In the MD Anderson cohorts, insomnia was associated with up to three‑fold higher cancer risk within five years.Why This Matters for Public Health and Clinical PracticeThe data position sleep quality alongside genetics and lifestyle as a potential lever for curbing the surge in early‑onset cancers. Experts caution that the studies show association, not causation, but note that sleep deprivation can impair immune function and promote behaviours (smoking, poor diet, reduced exercise) that are already linked to cancer.Looking Ahead: Research, Screening, and Prevention StrategiesStakeholders anticipate a wave of longitudinal studies to test whether improving sleep can lower cancer incidence. In the meantime, clinicians are likely to incorporate sleep assessments into risk‑stratification tools, while public‑health campaigns may emphasise sleep hygiene alongside anti‑smoking and sun‑safety messages.

The Resilience of Health Infrastructure in Conflict ZonesThe reconstruction of the Ebola treatment centre in the Democratic Republic of the Congo (DRC) marks a significant step in restoring public health services following the facility's intentional destruction during recent civil unrest. This event highlights the vulnerability of medical infrastructure to political volatility and the urgent need for protective measures for healthcare workers.Reconstruction of the Torched Treatment FacilityThe treatment centre, a critical asset in the fight against Ebola, was set ablaze by protesters, representing a direct assault on the nation's healthcare system. The rebuilding process indicates a rapid recovery effort by health authorities to ensure that medical care remains accessible to the affected population despite the disruption caused by the violence.Event: Deliberate arson of a medical facility.Location: Democratic Republic of the Congo.Status: Facility rebuilt and operational.Undermining Containment Efforts in the DRCThe destruction of the treatment centre poses a severe threat to the containment of infectious diseases. In regions already grappling with outbreaks, the loss of specialized medical facilities can lead to a rapid spread of infection, overwhelming local health systems and endangering the broader community.Future Risks to Global Health SecurityAs the centre reopens, the DRC faces a precarious future where political instability directly impacts public health outcomes. Analysts predict that without robust security guarantees and international support, similar attacks on health infrastructure will continue, posing a persistent challenge to global health security and the fight against Ebola.

On 29 May 2026, Israeli air strikes and a ground push that crossed the Litani River resulted in at least five civilian deaths in southern Lebanon, while Pentagon‑level talks were scheduled to address the rapidly deteriorating security situation. Israeli Ground Advance Across the Litani River Prime Minister Benjamin Netanyahu announced that Israeli forces had moved north of the Litani River, roughly 30 km from the border, marking a significant expansion of the ground offensive. The advance was accompanied by air strikes on towns such as Abbasiyeh and Deir Qanoun al‑Nahr, and evacuation warnings for seven additional southern towns. Casualty Toll and Child Impact Figures Five civilians killed in the latest strikes. Four deaths in Abbasiyeh and one in Deir Qanoun al‑Nahr. UNICEF reported 15 children killed and 62 injured in the past week, averaging 11 child casualties every 24 hours. Lebanese Ministry of Public Health cites 77 children killed or injured in the last seven days. Since March 2, 126 civil‑defence workers have been killed and 310 wounded. Humanitarian Crisis and Regional Stability Risks The intensified bombardment has forced hundreds of thousands of Lebanese to flee their homes, with about 40 hospitals in the south already closed. Aid groups, including Doctors Without Borders, warn they may have to withdraw if security does not improve, compounding the risk of a broader humanitarian catastrophe. Prospects for Pentagon Talks and Conflict Trajectory Lebanese and Israeli delegations are set to meet at the Pentagon, where Lebanon will demand an immediate halt to Israeli attacks. Israeli Brigadier General Amichai Levin and Lebanese officer Georges Rizkallah will represent their sides. The outcome of these talks could influence whether the conflict remains localized or escalates further, especially given U.S. Secretary of State Marco Rubio's expressed support for Lebanon’s sovereignty.

Fatalities Spark Global Scrutiny of the Kambo Healing RitualThe kambo ceremony—an ancient Amazonian rite that applies frog secretions to skin burns—has claimed at least six lives in the past two decades, including the recent death of UK wellness coach Kristian Trend (40). The surge in high‑profile fatalities is driving governments and health experts to demand stricter regulation of a practice that lacks scientific validation.Recent Deaths Highlight Risks of the Frog‑Poison CeremonyIn April 2026, Kristian Trend died after a “cleansing ceremony” in the United Kingdom, reigniting media calls for a ban. Earlier incidents include:2008 – 52‑year‑old man in Brazil.2018 – Italian man with pre‑existing heart conditions.2019 – Australian woman Natasha Lechner (39) seeking relief from chronic back pain.October 2021 – Australian Jarrad Antonovich (death linked to a perforated oesophagus).2024 – Mexican actress Marcela Alcazar Rodríguez (33) during a cleansing ritual.These cases illustrate the ritual’s unpredictable physiological effects, ranging from violent vomiting and hyponatremia to sudden cardiac arrest.Known Mortality Figures and Regulatory LandscapeMedical literature now records six confirmed deaths associated with kambo worldwide. A 2025 review in *Cureus* recommended tighter regulation after documenting severe reactions. Current legal status varies:Brazil banned sale and marketing in 2004.Chile prohibits importation.Australia classified kambo as a poison in 2021.United States deems it illegal; a 2025 US embassy advisory warned citizens against use in Peru.In the UK, frog poison can be purchased but is not a licensed medicine.Public Health and Legal Implications Across ContinentsThe ritual’s spread into Western “wellness” circles—particularly in the UK, US, Brazil, and Australia—poses a public‑health challenge. Health agencies warn that the peptide cocktail in kambo can cause:Severe nausea, vomiting, and diarrhoea.Rapid blood‑pressure drops and fainting.Cardiac arrhythmias and potential organ toxicity.Hyponatremia leading to brain swelling or death.Indigenous leaders, such as Yamanawa chief Joaquim Luz, have condemned commercial exploitation, emphasizing cultural appropriation and safety risks.Prospects for Regulation and Consumer ProtectionGiven the mounting evidence, experts anticipate a coordinated push for:Standardized licensing of practitioners where the ritual is permitted.Clear labeling and prohibition of online sales of raw frog secretions.Public‑education campaigns highlighting the lack of clinical efficacy.International cooperation to monitor cross‑border trade of the toxin.If authorities act swiftly, the next wave of fatalities could be averted, and the balance between cultural tradition and modern health safety may be better defined.

Record‑Breaking Temperatures Sweep EuropeA high‑pressure “heat dome” has locked over Europe this week, pushing daily maximums far beyond historical norms and sparking the continent’s hottest May on record.Heat Dome Drives Unprecedented May Highs Across the UK and IrelandThe United Kingdom set a new May maximum of 35.1 °C at Kew Gardens on Tuesday, eclipsing the 34.8 °C recorded just a day earlier. The previous record of 32.8 °C (first set in 1922 and matched in 1944) was therefore shattered twice in 48 hours. In Ireland, two stations logged 28.8 °C in Killarney and Clonmel, also breaking national May highs. Night‑time lows were equally extreme, with Camborne, England, falling only to 21.4 °C—a “tropical night” by definition.Temperature Extremes and Fatalities: The Numbers Behind the CrisisFrance recorded 36 °C on Monday and Tuesday, the hottest May days ever recorded there.A French government spokesperson linked seven deaths to the heat, either directly or indirectly.Across Europe, temperatures are running 10‑15 °C above the seasonal average.Projections indicate the continent will stay 5‑10 °C above average for the remainder of the week.In southeastern Australia, the Bureau of Meteorology warned of 40‑70 mm of rain in six‑hour periods, with isolated totals approaching 100 mm. Wind gusts of 65 mph (104 kph) were recorded in Narrabi, NSW.Implications for Public Health and Climate Resilience in EuropeThe combination of record heat and nighttime warmth raises the risk of heat‑related illnesses, especially among vulnerable populations. The French fatalities underscore how even short‑duration spikes can strain health systems. Moreover, the event highlights the growing frequency of extreme weather under climate change, prompting calls for stronger heat‑action plans, urban cooling strategies, and public awareness campaigns.Outlook: Cooling Trends and Ongoing Weather RisksModels suggest that the heat dome will gradually weaken, allowing the UK to see modest cooling early next week. However, the lingering warmth will keep temperatures above seasonal norms for several more days. Meanwhile, Australia remains on high alert for severe thunderstorms, with flash‑flood and hail threats persisting through Friday.