Project Wolbachia now covers more than half of all households in Singapore
The initiative now covers more than 840,000 households across Singapore.
A decade after its inception, Project Wolbachia – a program aimed at curbing dengue transmission through the release of genetically engineered mosquitoes – now extends to over half of Singapore's households, according to a recent announcement. Senior Minister of State for Sustainability and the Environment Janil Puthucheary revealed this milestone at a 10th-anniversary event held at Our Tampines Hub on October 31.
The initiative, which began in Ang Mo Kio in October 2016, has now reached approximately 840,000 households, representing 53% of all households in the country. This widespread implementation has notably reduced the Aedes mosquito population, the primary carrier of dengue, Zika, and chikungunya viruses, by 80 to 90% in areas covered by the project.
Research published in the New England Journal of Medicine in February indicated that Project Wolbachia led to a significant decrease in Aedes aegypti mosquito populations and a 70% reduction in dengue risk for residents in the affected areas. Despite these promising results, NEA cautioned that Project Wolbachia is not a panacea for dengue prevention, emphasizing the importance of individual responsibility in maintaining clean and mosquito-free environments.
In response to questions about future expansion plans, Ng Lee Ching, the group director of NEA's Environmental Health Institute, stated that the agency would conduct a thorough assessment of the current situation before deciding on any further steps. NEA has recently launched a children's book, featuring the project's mascot Wozzie, aimed at educating young readers about the science behind Project Wolbachia and promoting community safety from dengue.
The third quarter of 2026 saw a 79.7% increase in dengue cases compared to the previous quarter, with 1,384 reported cases during July to September, up from 770 cases in April to June. Despite the rise, the number of dengue cases remains below the seven-year low of 4,036 cases in 2025, marking a 70% decrease from the previous year. The DENV-3 serotype accounted for 45.9% of reported dengue cases in September, surpassing the previously dominant DENV-2 strain.
Experts attribute the recent surge in dengue cases to the peak of the dengue season, which typically occurs between May and October, and the ongoing El Nino phenomenon, which brings hotter and drier weather that accelerates mosquito breeding. Raman Velayudhan, deputy chair of NEA's dengue expert advisory panel, warned that a combination of these factors could lead to an increase in dengue cases worldwide in 2027, potentially impacting Singapore.
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