India: 33 acute diarrhoeal disease outbreaks in the 4 weeks to week 13 of 2025, against a median of 20 for the same weeks in 2022–24.

A single week of outbreak reports holds only a handful of events, too few to compare. So the observatory adds up the four weeks to this one and compares the total with the median of the same four weeks in up to three earlier years; the baseline is short because reporting itself has grown. Only rises are flagged, and only when the total is at least 5 above that median, because a fall in reported outbreaks mostly means that reports did not arrive. These are outbreaks reported to IDSP, so they reflect reporting as well as disease.

For acute diarrhoeal disease outbreaks, neither a rise nor a fall is better in itself, so the observatory marks this movement as unusual rather than good or bad.

Same four weeks: 2024 53, 2023 12, 2022 20. The preceding four weeks: 41. Counts are outbreaks reported to IDSP, which reflect reporting as well as disease.

Full history of acute diarrhoeal disease outbreaks in India