RecordWeek 50 of 2025 (8–14 Dec)Outbreaks
India: 8 chickenpox outbreaks in week 50 of 2025, the most since week 16 of 2025.
What happened
- Week 50 of 2025
- 8
- 2025-W16
- 10
Why it matters
A record says how long it has been since the series was this high or this low. It puts a single value in the context of the whole published history.
For chickenpox outbreaks, 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
33 consecutive earlier weeks were lower. It extends a run of new highests that began earlier.
The underlying data
| Period | Value | Release | Where in the document |
|---|---|---|---|
| Week 50 of 2025 | 8 | IDSP weekly outbreak report, 2025 week 50 (2025-12-08 to 2025-12-14) | IDSP weekly outbreak report 2025-W50, count over 8 rows for all States/UTs: p.7 JH/DUM/2025/50/2211, p.7 JH/EAS/2025/50/2212, p.9 KL/KAS/2025/50/2215, p.12 KL/THR/2025/50/2221, p.17 OR/SUN/2025/50/2230, p.17 TN/COI/2025/50/2231, p.19 TN/TIR/2025/50/2234, p.20 KL/KOL/2025/50/2236 |
| Week 16 of 2025 | 10 | IDSP weekly outbreak report, 2025 week 16 (2025-04-14 to 2025-04-20) | IDSP weekly outbreak report 2025-W16, count over 10 rows for all States/UTs: p.3 AS/BIS/2025/16/661, p.5 BH/PTN/2025/16/665, p.5 BH/VAS/2025/16/666, p.7 HR/NUH/2025/16/671, p.8 JH/GIR/2025/16/674, p.9 JH/SIM/2025/16/677, p.11 MP/DAT/2025/16/685, p.13 MP/SEO/2025/16/689, p.14 MG/EKH/2025/16/693, p.15 WB/ALP/2025/16/697 |
Source and method
More signals for chickenpox outbreaks in India
- India: 18 chickenpox outbreaks in the 4 weeks to week 25 of 2026, against a median of 10 for the same weeks in 2023–25.
- India: 21 chickenpox outbreaks in the 4 weeks to week 24 of 2026, against a median of 13 for the same weeks in 2023–25.
- India: 26 chickenpox outbreaks in the 4 weeks to week 16 of 2026, against a median of 17 for the same weeks in 2023–25.
- India: 33 chickenpox outbreaks in the 4 weeks to week 12 of 2026, against a median of 18 for the same weeks in 2023–25.
- India: 47 chickenpox outbreaks in the 4 weeks to week 11 of 2026, against a median of 18 for the same weeks in 2023–25.
- India: 57 chickenpox outbreaks in the 4 weeks to week 10 of 2026, against a median of 17 for the same weeks in 2023–25.
Cite this
According to the India Health Observatory, India: 8 chickenpox outbreaks in week 50 of 2025, the most since week 16 of 2025. Source: Integrated Disease Surveillance Programme, National Centre for Disease Control, MoHFW, IDSP weekly outbreak report, 2025 week 50 (2025-12-08 to 2025-12-14). https://indiahealthobservatory.com/signals/chickenpox-outbreaks--india--2025-w50--record
See also India and 8 in context.