Uganda is taking bold steps toward a potentially revolutionary approach to combating malaria — a disease that continues to devastate millions and strain the country’s healthcare system.
Malaria remains one of Uganda’s biggest public health burdens, accounting for between 30 and 40 percent of all outpatient visits in 2023, according to the World Health Organization.
Data from the Ministry of Health indicates that 16 people die daily due to malaria, with children under five and pregnant women being the most vulnerable.
During the 2010s, Uganda managed to curb malaria cases through the mass distribution of insecticide-treated mosquito nets and indoor residual spraying.
However, since 2020, the country has seen a troubling resurgence, a setback attributed to climate change, which has fueled the growth and spread of mosquito populations.
In response, scientists at the Uganda Virus Research Institute (UVRI) are developing a gene-drive technology that could transform malaria control efforts.
The initiative involves releasing genetically modified male mosquitoes carrying a gene that spreads rapidly through wild populations, limiting the mosquitoes’ ability to reproduce.
“Gene drives could complement existing strategies by addressing the root cause – the mosquito population itself,” said Dr. Jonathan Kayondo, head of entomology at UVRI, in an interview with Dialogue Earth.
Renewed Battle Against an Old Foe
Between 2013 and 2019, Uganda recorded major progress in reducing malaria cases, largely due to widespread insecticide-treated nets and spraying campaigns. However, studies show a rebound of cases to pre-intervention levels by 2020.
Researchers believe this resurgence could have been triggered by the change in insecticide formulation in 2019 to counter resistance, as well as disruptions caused by the COVID-19 pandemic.
Unlike traditional control methods, gene-drive technology is self-sustaining — meaning once released, it continues to spread on its own.
But this also raises ethical and ecological concerns since the altered genes cannot be withdrawn, and their spread across borders could be irreversible.
As of September 2025, Uganda had not yet released any genetically modified mosquitoes into the wild. All experiments remain confined to controlled laboratories in Entebbe, according to the Uganda National Council for Science and Technology.
A Growing Threat Under Climate Change
Africa remains the epicenter of malaria deaths, with 569,000 recorded in 2023. Research by the Boston Consulting Group and the Malaria Atlas Project projects said that climate change could cause up to 500,000 additional malaria-related deaths annually by 2050.
Rising temperatures, extreme weather events, and damage to mosquito nets and housing structures have all contributed to increased exposure to malaria.
Uganda ranks third globally in malaria cases, with more than 15,000 deaths recorded in 2023 alone. The five African nations with the highest malaria cases account for nearly half of the 246 million global infections.
Herbert Nabaasa, Uganda’s Commissioner for Health Services, has praised the gene-drive initiative as a progressive step.
“Research and possible interventions to control malaria are highly commended,” he said. “I welcome the move to bring on board that additional science — managing the mosquito population by checking on their sex or fertility capacity, eventually pulling down the biting capacity and biting rate.”
He added that climate change has drastically altered mosquito behavior. “We see that mosquitoes that would bite at night now can bite during the day.
The rising temperatures provide fertile grounds for breeding, and the warmth enhances larvae development,” Nabaasa explained.
Targeting the Fertility Gene
Dr. Birungi Krystal, an entomologist with the Target Malaria project at UVRI, explained how the gene-drive system works. “We are modifying the mosquito so that instead of laying up to 300 eggs each time, it would lay maybe 10 or less,” she said.
However, she noted that ensuring the gene modification is retained across generations remains a major challenge. “When you have a modification like this, which mosquitoes do not benefit from, that modification is usually wiped out even faster than regular genes.
This means you’d have to release large numbers of mosquitoes to compete with the wild ones,” she said. Gene drives attempt to overcome this by making the modified trait far more likely to be inherited, allowing it to spread rapidly through the population.
Ecological Concerns and Ethical Dilemmas
While the technology holds promise, environmental experts warn of unintended consequences.
“Suppressing a mosquito genus like Anopheles could trigger a range of unintended consequences within Uganda’s ecosystems,” said Opakrwoth Caysie, an environmental scientist from Makerere University.
“Mosquitoes are often perceived only as disease carriers, but they play important roles in nutrient cycling — their larvae feed on organic matter in water, help break it down, and recycle nutrients to maintain water quality,” he added.
Caysie cautioned that reducing mosquito numbers could disrupt predator-prey relationships and lead to wider ecological imbalances. “Altering or removing them may create far-reaching effects beyond malaria control, potentially leading to disruptions in biodiversity and unforeseen environmental risks.”
Lessons from Burkina Faso
Uganda’s cautious approach follows lessons learned from Burkina Faso, which in 2019 became the first African country to release genetically modified mosquitoes.
The release, under Target Malaria’s supervision, involved sterile males and did not result in ecological harm — but it was temporary.
The trial sparked public debate and accusations of “medical colonialism.” This year, when Burkina Faso launched a new gene-drive project involving 16,000 genetically altered mosquitoes, public backlash and misinformation forced researchers to suspend the trial just a week later.
“The key lesson from Burkina Faso is that local communities must be fully informed and consent clearly established,” said Noumechi Rochel, a regional health advocate. “Otherwise, trust erodes quickly, and the science becomes entangled in politics.”
The Road Ahead for Uganda
To avoid such controversies, Target Malaria Uganda has been conducting community sensitization meetings in potential trial districts.
These sessions use local languages and visual materials to help residents understand the science. However, some activists remain skeptical, arguing that rural communities may not fully grasp the long-term implications of gene drives.
“You cannot simplify this technology enough to guarantee full understanding,” said a Kampala-based human rights advocate. “That creates an imbalance of power between foreign funders, local scientists, and the communities who will live with the consequences.”
Uganda’s National Biosafety Committee is currently drafting regulations to govern genetically modified organisms, including gene drives. However, without a comprehensive biosafety law, the legal pathway for a field release remains uncertain.
For now, Uganda’s gene-drive mosquitoes remain confined to the laboratory — but the debate around them has already expanded beyond science. It now touches on ethics, sovereignty, and the delicate balance between innovation and environmental responsibility.
As the country weighs its next move, scientists, policymakers, and communities face a defining question: Can Uganda use cutting-edge science to defeat malaria without crossing an ecological line that nature may never be able to redraw?
