Outside the usual rangeWeek 51 of 2025 (15–21 Dec)Outbreaks
Nagaland: 5 outbreaks reported in the 4 weeks to week 51 of 2025, against a median of 0 for the same weeks in 2022–24.
What happened
- 4 weeks to week 51 of 2025 (15–21 Dec)
- 5
- That week alone: 1
- median of the same 4 weeks, 2022–24
- 0
- Change
- +5
- Change, per cent
- None before, so no percentage
Why it matters
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 outbreaks reported, neither a rise nor a fall is better in itself, so the observatory marks this movement as unusual rather than good or bad.
Historical context
Same four weeks: 2024 0, 2023 0, 2022 0. The preceding four weeks: 1. Counts are outbreaks reported to IDSP, which reflect reporting as well as disease.
The underlying data
| Period | Value | Release | Where in the document |
|---|---|---|---|
| Week 51 of 2025 | 1 | IDSP weekly outbreak report, 2025 week 51 (2025-12-15 to 2025-12-21) | IDSP weekly outbreak report 2025-W51, count over 1 row for Nagaland: p.12 NL/LON/2025/51/2255 |
| Week 50 of 2025 | 1 | IDSP weekly outbreak report, 2025 week 50 (2025-12-08 to 2025-12-14) | IDSP weekly outbreak report 2025-W50, count over 1 row for Nagaland: p.20 NL/MON/2025/50/2237 |
| Week 49 of 2025 | 2 | IDSP weekly outbreak report, 2025 week 49 (2025-12-01 to 2025-12-07) | IDSP weekly outbreak report 2025-W49, count over 2 rows for Nagaland: p.17 NL/TUE/2025/49/2189, p.22 NL/MON/2025/49/2198 |
| Week 48 of 2025 | 1 | IDSP weekly outbreak report, 2025 week 48 (2025-11-24 to 2025-11-30) | IDSP weekly outbreak report 2025-W48, count over 1 row for Nagaland: p.17 NL/LON/2025/48/2152 |
| Week 51 of 2024 | 0 | IDSP weekly outbreak report, 2024 week 51 (2024-12-16 to 2024-12-22) | IDSP weekly outbreak report 2024-W51, pp.3–14: no current-week or late-reported outbreak row for Nagaland |
| Week 50 of 2024 | 0 |
Source and method
- Release
- IDSP weekly outbreak report, 2025 week 51 (2025-12-15 to 2025-12-21)Archived fileOriginal URLFirst seen 3 Oct 2026
More signals for outbreaks reported in Nagaland
Cite this
According to the India Health Observatory, Nagaland: 5 outbreaks reported in the 4 weeks to week 51 of 2025, against a median of 0 for the same weeks in 2022–24. Source: Integrated Disease Surveillance Programme, National Centre for Disease Control, MoHFW, IDSP weekly outbreak report, 2025 week 51 (2025-12-15 to 2025-12-21). https://indiahealthobservatory.com/signals/outbreaks-reported--nagaland--2025-w51--baseline_breach
See also Nagaland and 1 in context.