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Europe Faces Rising Threat of Tropical Diseases as Mosquito Season Intensifies

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As Europe braces for another long, hot summer, public health officials are sounding the alarm over a growing threat: the spread of mosquito-borne diseases typically found in tropical climates. Warmer temperatures driven by climate change and increased global travel have created ideal conditions for viruses such as dengue, chikungunya, and West Nile to gain a foothold across the continent.

According to the European Centre for Disease Prevention and Control (ECDC), locally acquired dengue infections in Europe surged to 304 cases last year—compared to just 201 cases over the previous two years combined. Italy alone accounted for 238 of those infections, marking the largest dengue outbreak ever recorded in the European Union. Meanwhile, France is currently contending with seven active chikungunya outbreaks, indicating an unusually early start to the mosquito season.

“It’s an exponential curve,” said Jan Semenza, environmental epidemiologist at Umeå University in Sweden. “Diseases like dengue and chikungunya could become endemic in Europe if trends continue.”

Dengue, which can range from mild flu-like symptoms to severe illness and death, is particularly concerning due to its ability to spread undetected. Most people infected with the virus show no symptoms or only mild ones, making it easier for transmission to occur. Chikungunya, while rarely fatal, can cause painful and long-lasting joint issues.

Recent studies suggest that it now takes less than five years for newly arrived mosquito species in Europe to spark major outbreaks—down from an estimated 25 years in the 1990s. The time window for intervention is shrinking rapidly, according to Semenza.

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Globally, the situation is far worse. In 2025 alone, there have already been over three million dengue cases and 220,000 chikungunya cases reported, with more than 1,400 deaths from dengue and 80 deaths from chikungunya. Yet Europe is no longer immune. In Cyprus, health authorities have reported the reemergence of the mosquito species that transmits yellow fever—raising fears of further outbreaks.

While complete eradication of mosquitoes is unlikely, experts argue that more can be done to limit their impact. Semenza has called for enhanced surveillance in warmer European countries, especially near airports and travel hubs where infected individuals could unknowingly introduce viruses. Isolating such cases quickly could prevent local transmission.

Spain has adopted an innovative approach through a “citizen science” app that allows residents to upload mosquito photos. Using artificial intelligence, the app identifies species and alerts authorities to the presence of invasive varieties such as the Asian tiger mosquito, which can spread dengue and chikungunya. Since 2023, the app has helped detect the mosquito in over 150 municipalities.

The ECDC has also urged the public to take personal precautions, including the use of insect repellent, wearing long sleeves, and avoiding outdoor exposure at dawn and dusk. Travellers returning from dengue-endemic regions are advised to continue these measures for at least three weeks to reduce the risk of local transmission.

As the mosquito season lengthens and the risk grows, experts say European nations must draw on lessons from tropical regions long accustomed to managing these threats. “In Europe, it’s still a seasonal disease,” said Semenza. “But the season is expanding—and the cases will, too.”

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Experts Call for Stricter Fireworks Rules as Injuries Rise Across Europe

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Fireworks remain a popular feature of public celebrations, but health experts are calling for tighter regulations and greater public awareness as thousands of people suffer injuries each year.

In an opinion article published in the medical journal The BMJ, researchers from the University of California, Los Angeles (UCLA), warned that the dangers of fireworks are often underestimated and represent a significant public health concern.

Common injuries include severe burns, blast damage caused by shockwaves, traumatic brain injuries, amputated fingers and permanent loss of sight. Children, young men, rural communities and people from lower-income backgrounds are among those at greater risk. Bystanders can also be injured without handling fireworks themselves.

The authors are urging governments and health organisations in the United States and elsewhere to strengthen safety rules and invest in public education.

They recommend encouraging people to attend professionally organised displays rather than setting off fireworks at home. Medical and public health organisations could also challenge social media content that promotes private fireworks use.

The researchers propose school-based awareness campaigns for primary and secondary pupils, using real-life accounts and images of people injured by fireworks. They also suggest placing graphic injury warnings on packaging, similar to health warnings on cigarette packets.

Thousands seek medical treatment across Europe

Available figures highlight the scale of the problem, although many European countries do not maintain national records of firework-related injuries.

The Netherlands systematically collects data on incidents. During the 2025-2026 New Year celebrations, an estimated 1,239 people received emergency medical treatment at hospital emergency departments or out-of-hours general care services. This was 7% higher than the previous year.

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Italy’s Ministry of the Interior reported 283 injuries during New Year’s Eve celebrations, including 54 people who required hospital treatment.

Healthcare professionals say more countries need systematic reporting systems to establish the full extent of the injuries and identify where prevention measures are most needed.

Fireworks imports continue to grow

The health concerns come as the European fireworks market expands. Eurostat data published in December 2025 showed that the EU imported 120,000 tonnes of fireworks from outside the bloc in 2024, worth €406.7 million. Import volumes increased by 9.5% and their value by 21.5% compared with 2023.

A separate European Commission working document put the value of EU pyrotechnic imports at a record €452 million in 2024. The Netherlands accounted for 37% of extra-EU imports, followed by Germany at 35.6% and Poland at 7.4%.

Different rules across member states

EU legislation sets common safety requirements and divides consumer fireworks into four categories according to their hazard and intended use. Member states can impose stricter national restrictions on their sale, possession and use.

Minimum ages vary by category. Very low-hazard products, including some sparklers and party poppers, can generally be used from age 12, while certain low-hazard outdoor fireworks have higher age limits. Medium-hazard products intended for large open spaces carry a minimum age of 18 and require specialist knowledge.

Countries including the Netherlands, Germany, France and Italy have adopted additional restrictions, reflecting different national approaches to fireworks safety.

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One in Four Teenagers Worldwide Does No Weekly Exercise, Study Finds

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Around 240 million adolescents worldwide did not take part in physical activity on any day of the week in 2025, with girls falling further behind boys, according to a major global study published in The Lancet Global Health.

The research found that teenagers averaged 2.7 active days per week, a figure that remained unchanged between 2010 and 2025. Only 14 per cent, or about one in seven adolescents, reported being active every day.

The study analysed 389 surveys covering 3.2 million young people aged 11 to 17 across 140 countries. The data represented approximately 59 per cent of the global adolescent population.

Researchers defined an active day as one on which a teenager completed at least 60 minutes of moderate-to-vigorous physical activity. This follows the recommendation of the World Health Organization (WHO), which counts activity at school, during travel and in leisure time.

The findings raise concerns about progress towards the WHO’s target of reducing the proportion of adolescents who fail to achieve 60 minutes of daily activity by 15 per cent between 2010 and 2030. The researchers found that no country or region was currently on track to meet the goal.

A clear gender gap emerged from the data. Boys averaged three active days per week in 2025, compared with 2.4 days for girls. The difference widened as girls grew older, suggesting that existing opportunities and programmes were not reaching them equally.

Geographical differences were also substantial. Adolescents in Central and Eastern Europe and Central Asia, East Asia and the Pacific, and high-income Western countries averaged around four active days each week. In these regions, between 6.9 and 7.7 per cent of teenagers reported no physical activity at all.

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In contrast, young people in Latin America and the Caribbean, the Middle East and North Africa, Oceania, South and Southeast Asia, and sub-Saharan Africa averaged approximately two active days per week. The share reporting complete inactivity ranged from 22.7 to 33.1 per cent.

Finland, Canada and Serbia recorded the highest activity levels, with adolescents averaging between 4.5 and 4.8 active days weekly. Cambodia, Jordan and Madagascar were among the least active, averaging between 1.7 and 1.9 days.

The study’s authors linked these differences partly to structural conditions. Wealthier countries generally have more resources to support physical activity policies, provide public spaces and develop safe routes for walking and cycling.

The researchers said adolescence is an important period for establishing habits that influence health throughout adulthood. Regular exercise supports physical and mental wellbeing, but existing programmes are failing to reach large numbers of young people.

They called for stronger policies tailored to local conditions, with schools and neighbourhoods made more supportive of everyday activity. They also urged governments to address barriers affecting girls, including restrictive gender expectations, safety concerns and limited access to suitable sports and recreational activities.

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Health Groups Urge WHO to Tighten Drinking Water Nitrate Limits Over Cancer Risks

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A coalition of 85 international health and environmental organisations has urged the World Health Organization (WHO) to revise its drinking water standards for nitrate, warning that exposure to levels below the existing limit may be associated with colorectal cancer and premature births.

In an open letter sent on Tuesday, the groups called on the United Nations health agency to include nitrate in its forthcoHealth Groups Urge WHO to Tighten Drinking Water Nitrate Limits Over Cancer Risks

ming review of drinking water guidelines. Signatories include Greenpeace International, the World Organization of Family Doctors (WONCA) and the European Environmental Bureau.

The organisations argue that the WHO’s current nitrate limit is based on standards established decades ago and does not adequately reflect more recent scientific evidence about the potential effects of long-term exposure.

Nitrates and nitrites are naturally occurring compounds found in soil, water and food. However, human activities, including the use of agricultural fertilisers, manure runoff and poorly maintained septic systems, can increase nitrate concentrations in water supplies.

The current WHO guideline sets the maximum acceptable nitrate concentration at 50 milligrams per litre (mg/L), equivalent to 11.3 mg/L when measured as nitrate-nitrogen. The standard dates back to 1958 and was originally designed to prevent methaemoglobinaemia, commonly known as blue-baby syndrome. The condition reduces the blood’s ability to carry oxygen and can be fatal in infants.

The organisations say the existing threshold does not account for epidemiological research linking prolonged exposure to lower nitrate concentrations with other health risks, particularly bowel cancer and adverse pregnancy outcomes.

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“Studies now link nitrate in drinking water, at levels well below the current WHO limit, to bowel cancer and premature birth,” said Pratyush Kumar, chair of WONCA, in a joint statement.

Amanda Larsson, Greenpeace’s global project lead for agriculture, said access to safe drinking water should be treated as a basic guarantee rather than a privilege.

The coalition also cited a report commissioned by the Danish government last year, which concluded that the existing international standard was insufficient to protect public health. The expert panel recommended reducing the nitrate limit to 6.0 mg/L.

Denmark has committed to adopting the lower threshold, although it has not announced a timetable for implementation. The organisations said this creates a growing difference between international guidance and national drinking water policies.

Most governments use WHO recommendations as the basis for their own drinking water standards, making changes to the agency’s guidelines important for wider regulatory reform, the letter said.

The appeal was issued on World One Health Day, which highlights the links between human, animal and environmental health.

The signatories also called on governments to reduce pollution from intensive livestock farming and support producers in adopting more environmentally sustainable agricultural practices.

They said stronger protections against nitrate contamination were needed to safeguard drinking water supplies and reduce potential health risks, particularly for children and pregnant women.

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