Prism Geo · city intelligence · pilot
Prism Geo · Rankings · Train Derailment
Road safety & accidents · evidence ranking · 2021–2025

Which Indian cities show the strongest train derailment reporting signal?

A comparison of 45 Indian cities covered by Prism Geo. 18 pass the evidence gates and are ranked by exact train_derailment-tagged news reports per 10,000 civic reports. This measures the prominence of a topic in coverage—not real-world incidence, prevalence, or safety.

Geographic view · 18 city-linked districts

Where the train derailment reporting signal is concentrated

Every highlighted polygon is the 2021 administrative district containing a ranked city's coordinate. Color shows the city's reporting-signal rank band—not a measured district-wide rate, prevalence, or severity assessment.

Ranks 1–5Ranks 6–10Ranks 11–18 Not ranked
Indian districts containing cities in the train derailment reporting ranking India's national silhouette has a soft boundary shadow. District lines are subdued, while the 18 districts containing ranked cities are highlighted by rank. #7 Surat — Surat district proxy — 11.93 tagged reports per 10,000 civic reports#5 Visakhapatnam — Visakhapatnam district proxy — 16.22 tagged reports per 10,000 civic reports#11 Patna — Patna district proxy — 3.06 tagged reports per 10,000 civic reports#16 Kolkata — Kolkata district proxy — 1.60 tagged reports per 10,000 civic reports#17 Bengaluru — Bangalore district proxy — 1.03 tagged reports per 10,000 civic reports#2 Nashik — Nashik district proxy — 42.99 tagged reports per 10,000 civic reports#9 Mumbai — Mumbai Suburban district proxy — 5.02 tagged reports per 10,000 civic reports#4 Bhubaneswar — Khordha district proxy — 16.67 tagged reports per 10,000 civic reports#6 Jodhpur — Jodhpur district proxy — 12.29 tagged reports per 10,000 civic reports#14 Jaipur — Jaipur district proxy — 1.85 tagged reports per 10,000 civic reports#3 Mathura — Mathura district proxy — 27.84 tagged reports per 10,000 civic reports#15 Lucknow — Lucknow district proxy — 1.70 tagged reports per 10,000 civic reports#1 Kanpur — Kanpur Nagar district proxy — 87.75 tagged reports per 10,000 civic reports#13 Varanasi — Varanasi district proxy — 2.15 tagged reports per 10,000 civic reports#12 Ghaziabad — Ghaziabad district proxy — 2.35 tagged reports per 10,000 civic reports#8 Chennai — Chennai district proxy — 5.76 tagged reports per 10,000 civic reports#10 Prayagraj — Allahabad district proxy — 4.95 tagged reports per 10,000 civic reports#18 New Delhi — Central district proxy — 0.67 tagged reports per 10,000 civic reports

Boundary geometry: geoBoundaries, ADM2, 2021 representation, Open Data Commons Open Database License 1.0. Districts are visual locators for city-ranked data and may not reflect later administrative changes.

How to read this ranking

Kanpur leads the normalized comparison at 87.75 tagged reports per 10,000 civic reports. Kanpur leads raw volume with 65 reports. The two leaders can differ because normalization controls for each city's overall civic-news footprint.

Cities evaluated
45
existing India profiles
Cities ranked
18
passed both evidence gates
Normalized leader
Kanpur
87.75 per 10K
Raw-volume leader
Kanpur
65 tagged reports
Largest recent rise
Kanpur
+203.65 per-10K points
National comparison
+1.30
recent per-10K change
Computed findings
What stands out
Complete ranking
Primary and companion measures

Train Derailment reporting signal by city

The primary rank uses tagged reports per 10,000 civic reports. Raw rank, recent change, and active years show whether a result depends on city size, timing, or a narrow burst.

RankCitySignal / 10KTagged reportsRaw rankRecent changeActive years
1Kanpur
Uttar Pradesh
87.75651+203.653/5
2Nashik
Maharashtra
42.99157-58.161/5
3Mathura
Uttar Pradesh
27.84156+13.524/5
4Bhubaneswar
Odisha
16.67293-15.984/5
5Visakhapatnam
Andhra Pradesh
16.22612+5.363/5
6Jodhpur
Rajasthan
12.29416-19.351/5
7Surat
Gujarat
11.93514+36.231/5
8Chennai
Tamil Nadu
5.76165-3.233/5
9Mumbai
Maharashtra
5.02602+1.705/5
10Prayagraj
Uttar Pradesh
4.9589-7.193/5
11Patna
Bihar
3.0688-2.393/5
12Ghaziabad
Uttar Pradesh
2.35415+3.213/5
13Varanasi
Uttar Pradesh
2.15318+5.592/5
14Jaipur
Rajasthan
1.85317-0.252/5
15Lucknow
Uttar Pradesh
1.70611-1.632/5
16Kolkata
West Bengal
1.60513-3.171/5
17Bengaluru
Karnataka
1.03610-2.022/5
18New Delhi
Delhi
0.67204+0.734/5

A city qualifies with at least 3 exact-tag reports and 300 total civic reports across complete years 2021–2025.

City-by-city evidence
Normalized #1 · raw-volume #1 · established coverage base

Kanpur: Train Derailment reporting profile

65 tagged reports appeared within 7,407 civic reports in 2021–2025, equal to 87.75 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 6.73 in 2021–2023 versus 210.38 in 2024–2025. The city's peak normalized year was 2024.

Normalized signal
87.75
per 10K civic reports
Tagged coverage
65
3 active years
Recent change
+203.65
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 21.35/10K (3 reports)2024 · 333.53/10K (57 reports)2025 · 40.39/10K (5 reports)
Classifier category mix
Road safety & accidents · 65

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Kanpur's broader civic problems analysis →
Normalized #2 · raw-volume #7 · qualified coverage base

Nashik: Train Derailment reporting profile

15 tagged reports appeared within 3,489 civic reports in 2021–2025, equal to 42.99 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 58.16 in 2021–2023 versus 0.00 in 2024–2025. The city's peak normalized year was 2022.

Normalized signal
42.99
per 10K civic reports
Tagged coverage
15
1 active years
Recent change
-58.16
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 144.65/10K (15 reports)2023 · 0.00/10K (0 reports)2024 · 0.00/10K (0 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 15

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Nashik's broader civic problems analysis →
Normalized #3 · raw-volume #6 · qualified coverage base

Mathura: Train Derailment reporting profile

15 tagged reports appeared within 5,388 civic reports in 2021–2025, equal to 27.84 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 23.03 in 2021–2023 versus 36.55 in 2024–2025. The city's peak normalized year was 2025.

Normalized signal
27.84
per 10K civic reports
Tagged coverage
15
4 active years
Recent change
+13.52
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 27.55/10K (4 reports)2023 · 37.49/10K (4 reports)2024 · 26.20/10K (3 reports)2025 · 51.95/10K (4 reports)
Classifier category mix
Road safety & accidents · 15

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Mathura's broader civic problems analysis →
Normalized #4 · raw-volume #3 · established coverage base

Bhubaneswar: Train Derailment reporting profile

29 tagged reports appeared within 17,398 civic reports in 2021–2025, equal to 16.67 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 23.76 in 2021–2023 versus 7.78 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
16.67
per 10K civic reports
Tagged coverage
29
4 active years
Recent change
-15.98
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 7.19/10K (2 reports)2022 · 17.47/10K (6 reports)2023 · 43.29/10K (15 reports)2024 · 16.19/10K (6 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 29

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Bhubaneswar's broader civic problems analysis →
Normalized #5 · raw-volume #12 · qualified coverage base

Visakhapatnam: Train Derailment reporting profile

6 tagged reports appeared within 3,699 civic reports in 2021–2025, equal to 16.22 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 13.97 in 2021–2023 versus 19.33 in 2024–2025. The city's peak normalized year was 2024.

Normalized signal
16.22
per 10K civic reports
Tagged coverage
6
3 active years
Recent change
+5.36
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 14.53/10K (1 reports)2023 · 17.89/10K (2 reports)2024 · 44.31/10K (3 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 6

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Visakhapatnam's broader civic problems analysis →
Normalized #6 · raw-volume #16 · qualified coverage base

Jodhpur: Train Derailment reporting profile

4 tagged reports appeared within 3,256 civic reports in 2021–2025, equal to 12.29 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 19.35 in 2021–2023 versus 0.00 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
12.29
per 10K civic reports
Tagged coverage
4
1 active years
Recent change
-19.35
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 62.89/10K (4 reports)2024 · 0.00/10K (0 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 4

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Jodhpur's broader civic problems analysis →
Normalized #7 · raw-volume #14 · qualified coverage base

Surat: Train Derailment reporting profile

5 tagged reports appeared within 4,191 civic reports in 2021–2025, equal to 11.93 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 0.00 in 2021–2023 versus 36.23 in 2024–2025. The city's peak normalized year was 2024.

Normalized signal
11.93
per 10K civic reports
Tagged coverage
5
1 active years
Recent change
+36.23
per-10K points
Action marker
60.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 0.00/10K (0 reports)2024 · 74.63/10K (5 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 5

The classifier marked authority or institutional action in 3 reports (60.0%) and conclusion language in 3 (60.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Surat's broader civic problems analysis →
Normalized #8 · raw-volume #5 · qualified coverage base

Chennai: Train Derailment reporting profile

16 tagged reports appeared within 27,784 civic reports in 2021–2025, equal to 5.76 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 7.22 in 2021–2023 versus 3.99 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
5.76
per 10K civic reports
Tagged coverage
16
3 active years
Recent change
-3.23
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 8.41/10K (4 reports)2023 · 9.33/10K (7 reports)2024 · 8.33/10K (5 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 16

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Chennai's broader civic problems analysis →
Normalized #9 · raw-volume #2 · established coverage base

Mumbai: Train Derailment reporting profile

60 tagged reports appeared within 119,517 civic reports in 2021–2025, equal to 5.02 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 4.39 in 2021–2023 versus 6.09 in 2024–2025. The city's peak normalized year was 2024.

Normalized signal
5.02
per 10K civic reports
Tagged coverage
60
5 active years
Recent change
+1.70
per-10K points
Action marker
1.7%
classifier coverage
20212025
Annual evidence
2021 · 0.43/10K (1 reports)2022 · 7.70/10K (22 reports)2023 · 4.27/10K (10 reports)2024 · 8.10/10K (17 reports)2025 · 4.28/10K (10 reports)
Classifier category mix
Road safety & accidents · 59Public safety · 1

The classifier marked authority or institutional action in 1 reports (1.7%) and conclusion language in 1 (1.7%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Mumbai's broader civic problems analysis →
Normalized #10 · raw-volume #9 · qualified coverage base

Prayagraj: Train Derailment reporting profile

8 tagged reports appeared within 16,169 civic reports in 2021–2025, equal to 4.95 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 8.46 in 2021–2023 versus 1.27 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
4.95
per 10K civic reports
Tagged coverage
8
3 active years
Recent change
-7.19
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 6.41/10K (1 reports)2022 · 0.00/10K (0 reports)2023 · 13.77/10K (6 reports)2024 · 2.40/10K (1 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 8

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Prayagraj's broader civic problems analysis →
Normalized #11 · raw-volume #8 · qualified coverage base

Patna: Train Derailment reporting profile

8 tagged reports appeared within 26,153 civic reports in 2021–2025, equal to 3.06 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 4.12 in 2021–2023 versus 1.73 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
3.06
per 10K civic reports
Tagged coverage
8
3 active years
Recent change
-2.39
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 1.86/10K (1 reports)2023 · 10.41/10K (5 reports)2024 · 3.51/10K (2 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 8

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Patna's broader civic problems analysis →
Normalized #12 · raw-volume #15 · qualified coverage base

Ghaziabad: Train Derailment reporting profile

4 tagged reports appeared within 17,010 civic reports in 2021–2025, equal to 2.35 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 1.01 in 2021–2023 versus 4.22 in 2024–2025. The city's peak normalized year was 2025.

Normalized signal
2.35
per 10K civic reports
Tagged coverage
4
3 active years
Recent change
+3.21
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 2.89/10K (1 reports)2023 · 0.00/10K (0 reports)2024 · 2.47/10K (1 reports)2025 · 6.54/10K (2 reports)
Classifier category mix
Road safety & accidents · 4

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Ghaziabad's broader civic problems analysis →
Normalized #13 · raw-volume #18 · qualified coverage base

Varanasi: Train Derailment reporting profile

3 tagged reports appeared within 13,958 civic reports in 2021–2025, equal to 2.15 per 10,000. The recent-period comparison shows a rising share of local civic coverage: 0.00 in 2021–2023 versus 5.59 in 2024–2025. The city's peak normalized year was 2024.

Normalized signal
2.15
per 10K civic reports
Tagged coverage
3
2 active years
Recent change
+5.59
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 0.00/10K (0 reports)2024 · 5.67/10K (2 reports)2025 · 5.43/10K (1 reports)
Classifier category mix
Road safety & accidents · 3

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Varanasi's broader civic problems analysis →
Normalized #14 · raw-volume #17 · qualified coverage base

Jaipur: Train Derailment reporting profile

3 tagged reports appeared within 16,200 civic reports in 2021–2025, equal to 1.85 per 10,000. The recent-period comparison shows a broadly stable share of local civic coverage: 1.94 in 2021–2023 versus 1.69 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
1.85
per 10K civic reports
Tagged coverage
3
2 active years
Recent change
-0.25
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 4.93/10K (2 reports)2024 · 3.85/10K (1 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 3

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Jaipur's broader civic problems analysis →
Normalized #15 · raw-volume #11 · qualified coverage base

Lucknow: Train Derailment reporting profile

6 tagged reports appeared within 35,340 civic reports in 2021–2025, equal to 1.70 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 2.34 in 2021–2023 versus 0.71 in 2024–2025. The city's peak normalized year was 2021.

Normalized signal
1.70
per 10K civic reports
Tagged coverage
6
2 active years
Recent change
-1.63
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 7.50/10K (5 reports)2022 · 0.00/10K (0 reports)2023 · 0.00/10K (0 reports)2024 · 1.31/10K (1 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 6

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Lucknow's broader civic problems analysis →
Normalized #16 · raw-volume #13 · qualified coverage base

Kolkata: Train Derailment reporting profile

5 tagged reports appeared within 31,282 civic reports in 2021–2025, equal to 1.60 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 3.17 in 2021–2023 versus 0.00 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
1.60
per 10K civic reports
Tagged coverage
5
1 active years
Recent change
-3.17
per-10K points
Action marker
20.0%
classifier coverage
20212025
Annual evidence
2021 · 0.00/10K (0 reports)2022 · 0.00/10K (0 reports)2023 · 9.26/10K (5 reports)2024 · 0.00/10K (0 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 5

The classifier marked authority or institutional action in 1 reports (20.0%) and conclusion language in 1 (20.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Kolkata's broader civic problems analysis →
Normalized #17 · raw-volume #10 · qualified coverage base

Bengaluru: Train Derailment reporting profile

6 tagged reports appeared within 58,199 civic reports in 2021–2025, equal to 1.03 per 10,000. The recent-period comparison shows a falling share of local civic coverage: 2.02 in 2021–2023 versus 0.00 in 2024–2025. The city's peak normalized year was 2023.

Normalized signal
1.03
per 10K civic reports
Tagged coverage
6
2 active years
Recent change
-2.02
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 1.59/10K (1 reports)2022 · 0.00/10K (0 reports)2023 · 3.97/10K (5 reports)2024 · 0.00/10K (0 reports)2025 · 0.00/10K (0 reports)
Classifier category mix
Road safety & accidents · 6

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open Bengaluru's broader civic problems analysis →
Normalized #18 · raw-volume #4 · established coverage base

New Delhi: Train Derailment reporting profile

20 tagged reports appeared within 297,207 civic reports in 2021–2025, equal to 0.67 per 10,000. The recent-period comparison shows a broadly stable share of local civic coverage: 0.39 in 2021–2023 versus 1.12 in 2024–2025. The city's peak normalized year was 2025.

Normalized signal
0.67
per 10K civic reports
Tagged coverage
20
4 active years
Recent change
+0.73
per-10K points
Action marker
0.0%
classifier coverage
20212025
Annual evidence
2021 · 0.22/10K (1 reports)2022 · 0.00/10K (0 reports)2023 · 0.85/10K (6 reports)2024 · 0.97/10K (6 reports)2025 · 1.27/10K (7 reports)
Classifier category mix
Road safety & accidents · 20

The classifier marked authority or institutional action in 0 reports (0.0%) and conclusion language in 0 (0.0%). These are article-level signals: repeated coverage can refer to the same underlying event, and the markers do not prove official resolution.

Open New Delhi's broader civic problems analysis →
National trend and methodology
All 45 cities

Annual normalized signal

20212025
2021 · 0.77/10K (12)2022 · 2.62/10K (57)2023 · 3.46/10K (75)2024 · 5.76/10K (118)2025 · 1.60/10K (31)

Annual values use all covered cities, including cities that do not pass the page-level ranking gate.

Transparent limits

How Prism Geo built this ranking

  • Universe: 45 Indian cities with an existing Prism Geo city manifest; conservative legacy names such as Bangalore/Bengaluru are merged.
  • Window: complete calendar years 2021–2025. Partial 2026 data is excluded.
  • Signal: the exact source tag train_derailment; topic variants are not silently combined.
  • Score: tagged reports ÷ all civic reports × 10,000; raw volume is shown alongside it.
  • Coverage, action, and conclusion figures are classifier outputs. Multiple reports can concern one event, and absence of coverage is not absence of a problem.

Source: marketai.civic_geo_agg. This dataset supports comparison of reporting patterns only; it cannot establish actual case counts, risk, prevalence, or official performance.

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