Kolkata Dengue & Malaria
Dengue and malaria in Kolkata (KMC counts reported in the press) and West Bengal (NCVBDC state tables). Only figures that trace to a named source are shown.
2023 was a record dengue year in Kolkata. KMC counted 13,926 cases in the corporation area. In 2024 the count fell to 1,316, a drop of about 91%. Both figures are KMC Health department numbers presented with the KMC 2026-27 budget and reported by the press. KMC does not publish them as an open dataset.
Malaria in the KMC area is also falling. Counting from 1 January to early November each year, cases went from 9,309 in 2023 to 3,725 in 2025. Across West Bengal, official NCVBDC tables show malaria at 26,440 cases in 2018 and 19,840 in 2025. The state's dengue reporting to NCVBDC has large gaps: 2023 and 2024 are partial, and 2025 was not reported.
About this data
What this page shows
The page has two separate panels. The Kolkata panel shows dengue and malaria counts for the Kolkata Municipal Corporation area, as reported in news articles. The West Bengal panel shows dengue, malaria and chikungunya for the whole state, taken from NCVBDC tables. The two panels cover different areas and come from different kinds of source, so they are never added together or plotted on the same chart.
Kolkata sources (secondary)
Full-year dengue for 2023 and 2024, and the same-window counts for 2023 and 2025: KMC Health department, via Millennium Post, 17 Feb 2026. Same-window counts for 2024: KMC sources, via ETV Bharat, 10 Nov 2024. Kolkata-district malaria for 2024 (10,177): Union Health Ministry data, via Millennium Post, 5 Jul 2025. The ministry document behind that figure has not been located. Dengue counts to 26 October each year are also available, from ThePrint/PTI, 1 Nov 2025.
West Bengal sources (primary)
Each figure comes from the West Bengal row of an NCVBDC state-wise table: Dengue cases and deaths 2021-2026; Malaria situation 2022-2026; Malaria situation 2015-2019 (for 2018); Malaria monthly epidemiological situation to Sep 2026; Chikungunya cases 2021-2026.
What is not here, and why
No public source gives annual Kolkata totals for cholera, typhoid or acute diarrhoeal disease. IDSP publishes weekly lists of outbreaks, not case totals. NCVBDC publishes chikungunya by state, not by city. No monthly dengue series for Kolkata is published either, so this page has no seasonal profile, peak month, disease-mix breakdown or dengue-temperature chart. An earlier version of this page showed all of those, plus figures such as “13,015 cases across six diseases” and “2,750 dengue cases in 2024”. An audit found that none of those figures could be traced to a source, so they have been withdrawn.
Limitations worth knowing
These are surveillance counts, which undercount real illness. A case is counted only when someone is tested at a reporting facility. Kolkata figures exist only as a KMC count or a district count, and the two do not agree. For 2024 malaria, the district count (10,177) is roughly double the KMC count to early November (5,187). West Bengal's dengue gaps are gaps in what the state reported to NCVBDC, not evidence that there were no cases. State health department sources told IANS that West Bengal passed 98,000 dengue cases by early December 2023, three times the 30,683 that NCVBDC records up to 13 September.
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