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Dengue will cover virtually all of Brazil and Mexico by 2039, according to a study

America is the continent most affected by dengue, with 8.1 million cases, and the situation will worsen in the coming years, according to a report that predicts that the infection will spread by 2039 to the practice the entire territory of Brazil and Mexico, the two largest countries in Latin America.

The research, published in the journal Nature Communications and in which scientists from Canada, the United Kingdom, Australia, the United States, Brazil and Mexico collaborated, predicts that by 2039 97% of the localities in Brazil will be affected by dengue, while in Mexico the figure will be 81%.

The analysis predicts that in Mexico the expansion of dengue will be mainly in the interior of the country, in the highest altitude areas of the central plateau.

The study estimates that the area of Tijuana, on the border with the United States, will be invaded between 2027 and 2030, and the area of Mexico City, between 2038 and 2039.

In Brazil, most of the areas invaded in the coming years will be in the south.

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The situation is already alarming, according to experts from the Pan American Health Organization (PAHO) who met at the end of May in Washington, because so far this year, there are already three times more documented cases than the cases recorded in the same period of 2023. The deaths stand at 3,600.

The international team of researchers pointed out in their study that the spread of dengue, a febrile disease that is transmitted by the bite of a mosquito (Aedes aegypti) and that can cause difficulty breathing, severe bleeding and organ complications, will accelerate in the coming years due to the climate crisis and the greater mobility of the population.

The researchers used for the first time machine learning technology (known by artificial intelligence) to understand how the connection between areas and environmental conditions interact at the different stages of the infection, one of the scientists who participated in the study, Vinyas Harish, of the University of Toronto (Canada), told EFE.

“Many people have investigated environmental factors such as temperature, humidity, rain, to establish the relationship between those characteristics and mosquitoes,” Harish said.

“But to really understand how dengue affects the population, we needed to integrate that with data on the population’s mobility over time. We use machine learning to integrate those perspectives,” he added.

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The data that the team used come from more than 8,000 municipalities in Brazil and Mexico during the past 25 years along with climate information, records of the appearance of epidemics and the history of genetic evolution.

In 1996, only 16 municipalities in Mexico (0.65% of the country’s total) were affected by dengue infection. But between 2000 and 2010, the infection expanded to 965 municipalities and by the end of 2019 the figure reached 1,350, 55% of the total.
In Brazil, the growth was similar. In 2001, dengue was only present in two states and 549 municipalities (9.96%). By 2019, the figure had exploded to 4,299 municipalities, 76.8%.

According to PAHO, there is no specific medicine to treat dengue, whose infection can occur without symptoms, or can be evidenced with symptoms ranging from a moderate fever to a high and incapacitating fever, headaches, muscle aches and rashes.

But Harish was optimistic since the conclusions of the study will allow the authorities to adopt preventive measures.

“From simple interventions, such as increasing awareness among the population to avoid the bites of these mosquitoes, to more complex, such as research on vaccines or mosquito replacement techniques,” he concluded.

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International

Air Canada suspends JFK flights amid soaring fuel costs linked to Iran conflict

Air Canada announced on Friday that it will suspend its flights from Montreal and Toronto to New York’s John F. Kennedy International Airport from June through late October, citing rising jet fuel costs driven by the conflict involving Iran.

“Since the beginning of the conflict with Iran, some routes and less profitable flights have become economically unviable, so we are making adjustments accordingly,” the airline said in a statement.

Despite the suspension, the carrier confirmed it will continue operating 34 daily flights from six Canadian cities to New York’s LaGuardia Airport and Newark Liberty International Airport.

Air Canada expects to resume its JFK operations after October 25.

Meanwhile, Iran announced the reopening of the Strait of Hormuz amid a temporary ceasefire in the region. However, jet fuel shortages could persist even if the truce holds.

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Fuel accounts for between 25% and 30% of operating costs for most airlines, and carriers worldwide have responded to the crisis by raising fares and suspending select routes due to safety and profitability concerns.

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International

UK braces for potential CO₂ shortage amid Middle East tensions

The government of United Kingdom is preparing contingency measures amid fears of a potential shortage of carbon dioxide (CO₂), which could impact the agri-food industry if the Strait of Hormuz remains blocked due to the ongoing conflict in the Middle East, The Times reported on Thursday.

According to the newspaper, officials assessed this scenario during a recent crisis meeting aimed at evaluating the consequences of a prolonged conflict, triggered on February 28 by joint attacks from United States and Israel against Iran.

Under this scenario, CO₂ supplies—primarily a byproduct of fertilizer production using natural gas—could fall by up to 18%, affecting multiple sectors including agriculture and food production.

The gas is widely used in the slaughter of pigs and poultry, as well as in extending the shelf life of packaged foods. Breweries could also face disruptions due to reduced availability.

“I don’t want to comment on a leak, but now that the information is out there, I hope people feel reassured knowing we are working on it,” said Peter Kyle, Secretary of State for Business and Trade, in remarks to Sky News.

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While a drop in CO₂ supply is not expected to cause major shortages in supermarkets, it could limit product variety, The Times noted, citing access to internal government documents.

To mitigate the impact, authorities are considering prioritizing CO₂ supply for critical sectors such as healthcare and civil nuclear energy, where it is used in cooling systems for blood reserves, organs, vaccines, and electricity generation. The government may also request domestic producers to increase output.

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Central America

El Salvador and Paraguay approve 2026–2028 cooperation program

The governments of El Salvador and Paraguay approved the 2026–2028 Cooperation Program, which includes six joint development projects, according to Salvadoran Vice Minister of Foreign Affairs Adriana Mira.

Mira stated that El Salvador will act as the “main provider of cooperation,” contributing five initiatives focused on road infrastructure, tourism, and local development. She also noted that one of the projects will be led by the Paraguayan side, although no further details were disclosed.

The agreement was reached during the Second Meeting of the Joint Commission on Technical and Scientific Cooperation between both countries.

According to Paraguay’s Ministry of Foreign Affairs, the First Meeting of the Political Consultation and Bilateral Coordination Mechanism was also held, with the participation of Vice Minister Víctor Verdún.

In an official statement, the Paraguayan government reported that both delegations agreed to identify mechanisms to promote competitiveness, economic growth, and market access. They also committed to signing agreements related to air transport cooperation.

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