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What’s on · All reads · No. 005
Health· 9 Nov 2026 · 2 min read

Dengue is climbing again: why the balcony check still matters

Cases rose almost 80% last quarter and a new strain is taking over. Wolbachia helps, but standing water at home is still the part we control.

Impasto painting of a parent and a small child crouching on an HDB balcony, emptying water from a plant dish into a pail beside potted plants and a watering can

We went looking at the latest dengue numbers expecting good news, because Project Wolbachia has just turned ten and the headlines were all about it. The headlines were right. The numbers underneath are a bit more mixed.

NEA counted 1,384 dengue cases between July and September, up from 770 the quarter before. Over the year so far things are still better than 2025, so this is a wobble rather than an outbreak. What makes it worth a mention is the new strain. DENV-3 was behind almost half of cases by the end of September, and The Straits Times notes that a change of strain usually brings a spike, since fewer people are immune to the new one.

Wolbachia is doing its bit. It now covers 53% of households, and where it runs, dengue risk is down by more than 70%. It only goes after one species, though, Aedes aegypti, and Senior Minister of State Janil Puthucheary was upfront that it is not a silver bullet. Other mosquitoes here can carry dengue, Zika and chikungunya too.

Which leaves the part that was always ours: standing water at home. It is not glamorous. A plant tray, a pail, anything on the balcony that holds a little rain. Officials keep coming back to it because it is the one piece nobody else can do for us, and it takes about ten minutes. If you have a child who likes a treasure hunt, this is one.

If you are curious how close the problem is, NEA lists dengue clusters under surveillance on its website. For the little ones, NEA has just put out a picture book, Kai's Tiny Adventure with Wozzie, which is going into public libraries.

Whether next year is worse is anyone's guess. NEA's dengue adviser Raman Velayudhan said El Nino and changing weather could push cases up in 2027, and that "we need to be on our guard." Nobody has said it will happen. For now, the numbers say a glance at the balcony is time well spent.

Where we checked
The Straits Times: Project Wolbachia now covers more than half of all households in Singapore (31 Oct 2026) · NEA: Dengue clusters under surveillance
Checked 6 Nov 2026. General guidance, not medical advice. Let us know if something’s out of date.