Baseline visit v1 schema · facts legacy-derived · descriptive report

www.cdc.gov

https://www.cdc.gov/

Sep 7, 2026, 5:00 AM UTC

complete; derived from status and warnings

View site history Scan this exact route again

Comparison Reportv1 schema · facts legacy-derived · descriptive report

Brave-list blocking off/on comparison

https://www.cdc.gov/…

SharePDF + evidence

What this actually means

cdc.gov recorded 3 fewer third-party requests in the visit configured for Brave-list blocking.

The visit with no blocking made 52 requests; the visit configured to apply Brave's ad-block engine and default Shields filter lists (a simulation in this scanner's browser, not a live Brave-browser visit) recorded 3 fewer third-party requests. The blocker directly stopped 3 requests; the remaining difference may include follow-on requests that never started once their sources were blocked, plus run-to-run variance.

1tracking-service entity

4cross-site requests

Plain-Language Findings

What this visit means

Unfamiliar terms are defined in the glossary

playwright-chromium

Context

Bottom line: this visit has review-worthy signals

The scan observed signals a non-expert should not have to decode from raw request tables.

The cards below translate the evidence into plain language; severity reflects fixed reference thresholds, not measured population percentiles. The request log, domain table, and methodology remain below for verification.

52 requests observed in one controlled visit.

Context

5 requests matched Brave Shields filter lists

5 requests matched the default filter lists of Brave Shields, the ad and tracker blocker built into the Brave browser, while loading normally.

Computed with Brave's own ad-block engine and default filter lists in classification mode: matched requests were not blocked by the scanner and remain in this report's observed request counts. Matching shows what Shields would target on this visit's traffic; an actual Shields visit blocks these and also prevents their follow-on requests, so this number is neither a measured block count nor the total effect.

The hand-curated service catalog separately matched 3 request rows in this visit.Show matched requests

Nothing observed

Lower values observed across comparable metrics in the Brave-list blocking attempt

With the scanner configured to apply Brave's ad-block engine and default Shields filter lists (a simulation in this scanner's browser, not a live Brave-browser visit; application was not verified), this paired visit showed 3 fewer third-party requests and 3 fewer tracking-related service requests.

Services only seen in the unblocked visit: Google. The blocking visit's engine directly blocked 3 requests; the remaining difference may include follow-on requests that never started once their sources were blocked. A single paired comparison can also reflect run-to-run variance (ad rotation, caching, experiments), so treat this as an observed difference, not a measured blocking rate.

Signed per-metric differences between the two visits; nothing is summed across metrics.Show matched requests

Context

Privacy policy read; it made no statement this scan can check

None of the statements this scan knows how to check appear in the policy text, so nothing was compared against this visit's evidence (1 of 1 observed tracking company named in the policy). That is a limit of the automated check, not a finding about the site either way.

Statements checked automatically: blanket no-cookie claims, third-party-cookie claims, and combined do-not-sell-or-share claims against advertising-pixel identifier fields. Global Privacy Control claims are never checked against request counts, which cannot show whether selling or sharing stopped.

Policy at https://www.cdc.gov/{seg}/{seg}; 0 checkable statements matched; 1 of 1 observed tracking company named in the policy.

Context

Catalogued service domains recorded responses during this visit

Google appeared in the request log.

A catalog match identifies a maintainer-reviewed service/domain mapping; it does not establish why an individual request occurred, what it carried, or whether profiling happened. Functional catalog labels include analytics / tag management. This scan could not identify 1 of the 3 third-party hosts recorded here, so it cannot say who operates it. That is a limit of identity coverage, not evidence about the site.

4 cross-site requests across 3 third-party hosts.Modest distinct tracking-service entities count.Show third-party requests

Context

Requests were dispatched to catalogued major-platform domains

This visit dispatched requests to catalogued domains for Google.

The domain matches identify services, not the requests' purpose, payload, or whether any profile linking occurred.

3 requests to these platforms.Show catalog-matched requests

Nothing observed

Google Analytics present, no remarketing signal

Google Analytics was observed, but no DoubleClick remarketing sync appeared in this visit.

Standard analytics collection was observed, without the stats.g.doubleclick.net advertising sync.

Google Analytics host observed; no stats.g.doubleclick.net request.Show catalog-matched requests

Nothing observed

No third-party cookies observed

The automated visit did not observe third-party cookies.

This does not prove the site never uses cookies; it means this visit did not observe third-party cookies.

11 cookies total in this report.No third-party cookies observed.

Context

Fingerprint-like browser APIs were called

1 high-entropy API call appeared in the instrumentation log.

These calls can be legitimate (charts, graphics, media), so the count is observational, not a severity score, and it excludes Web and Service Workers. Top calls: canvas.toDataURL.

1 API family recorded.

Brave Shields Comparison

No blocking → Brave-list blocking delta

No blocking: 11,790msBrave-list blocking: 2,591ms

Some deltas are not comparable across these two visits and are not shown.

Other detector and causal-path deltas (each visit's own evidence still renders below): v1 never recorded detector versions, so fingerprinting and pixel deltas cannot be proven to come from matching instrumentation.
The Shields-number delta (each visit's own evidence still renders below): The two visits measured different Shields quantities (filter-list matches vs engine-blocked requests), which must never share a delta.
Fingerprinting deltas (each visit's own evidence still renders below): At least one visit did not complete the fingerprint measurement, so no exact cross-visit delta is shown.
Ad-pixel deltas (each visit's own evidence still renders below): At least one visit did not complete the pixel measurement, so no exact cross-visit delta is shown.

Requests-5No blocking: 52 · Brave-list blocking: 47

Third-party requests-3No blocking: 4 · Brave-list blocking: 1

Third-party domains-2No blocking: 3 · Brave-list blocking: 1

Cookies-2No blocking: 11 · Brave-list blocking: 9

Third-party cookies0No blocking: 0 · Brave-list blocking: 0

Storage keys0No blocking: 4 · Brave-list blocking: 4

Catalog-matched requests-3No blocking: 3 · Brave-list blocking: 0

Every signed change is Brave-list blocking minus No blocking. A positive or negative direction is descriptive, not a judgment that the result is better or worse.

Cookie and storage count deltas include every observation. Name-level lists show only reviewed names; unreviewed names are not itemized because they can contain identifiers.

Largest per-domain request-count changes

*.cdc.govfirst partyNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2

www.google-analytics.comGoogle · analytics / tag managementNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2

www.googletagmanager.comGoogle · analytics / tag managementNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1

Domains only with Brave-list blocking

No domain changes observed.

Domains only with No blocking

*.cdc.govunlabeled · Show No blocking requests2

www.google-analytics.comGoogle · analytics / tag management · Show No blocking requests2

www.googletagmanager.comGoogle · analytics / tag management · Show No blocking requests1

Visible cookie names only with Brave-list blocking

No visible cookie-name changes to show; privacy-filtered names are not itemized.

Visible cookie names only with No blocking

_ga.cdc.govfirst-party

Visible storage keys only with Brave-list blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Visible storage keys only with No blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Entities only with Brave-list blocking

No entity changes observed.

Entities only with No blocking

Google2 domains3

Measurement limits

7 conditions affect how this evidence reads

This report

Brave-list blocking comparison runs should be collected under matched crawl conditions, and the blocking run is a simulation with Brave's engine and default lists in this scanner's browser, not a live Brave visit. Differences can still reflect timing, experiments, cache state, consent state, or bot detection.
The two visits ran in randomized order; the "No blocking" visit ran first.

Both visits

Each visit in this report is one automated, headless Chromium visit from a fixed en-US / UTC profile, with no scrolling, clicking, or consent interaction. Sites can behave differently for real users, browsers, regions, accounts, or network locations.
Counts are a lower bound: trackers that load only after interaction or consent are not observed; Service Workers are blocked, and Web Worker or WebSocket traffic may be incomplete. Service labels use a US-biased hand-curated catalog, so regional services may be under-labeled. Cookie and storage figures are an end-of-visit snapshot, with storage keys read from the top frame only.
Read the site's privacy policy (https://www.cdc.gov/{seg}/{seg}) and compared its text against this visit's observed behavior. Policy checks are an automated text match with the matched sentences quoted, not a legal reading.

No blocking visit only

The page did not reach network idle before the scan window ended.

Brave-list blocking visit only

Brave Shields block simulation was enabled; matching requests were aborted before loading and are not included in request totals.

How to use this report

Read the findings and measurement limits first, then inspect the evidence for each recorded visit. Comparisons include both visits, even where a difference cannot be interpreted.

Keep this PDF with its evidence package: the source JSON, correction context, export receipt and SHA256SUMS. The package preserves source bytes and the correction context at export time. Hashes check file consistency; they do not establish independent measurement accuracy or a signed attestation.

Correction context SHA-256: 1a6acc2ad1147c0255b04d14d2748f411159a9516f818959dd3054be53ed216c

Renderer revision: 3c18992e02534f33c825f7c2e51dd534d3ccab0d

No blocking — evidence

2026-09-07T05:00:20.878Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Which actor each third-party request is attributed to, from the initiator the browser reported. Attribution, not causation: an initiator may itself have been told what to fetch, and requests with no reported initiator are not distinguished from ones fetched from several. Asterisks mark subdomain labels hidden for privacy.

Attributed requests: 4
Not attributable: 0
Third-party requests: 4

4 third-party requests: 4 attributed to a single recorded actor, 0 not attributable.

Select a relationship to see its detail and open the rows behind it.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.

Requests524 third-party

Matched Shields lists5classification reported by this visit; no engine readback recorded

Third-party domains31 distinct catalogued service entity

Cookies110 third-party

Storage keys44 keys privacy-filtered; values omitted

Fingerprint API calls11 API family

GPC signalConfigured offreadback not recorded

Duration11.8s5:00:20 AM UTC

Request composition & timeline

First-party requests 48

Other third-party requests 1

Catalog-matched third-party requests 3

52 requests were recorded from 42 ms to 5,657 ms. Open the request log for exact timing and request details.

0 ms5,657 ms

Top Third Parties

www.google-analytics.comGoogle: analytics / tag management

www.googletagmanager.comGoogle: analytics / tag management

*.digitalgov.govoperator unidentified

Advertising Pixels

This legacy report did not record pixel evidence; an empty display is not an absence finding.

Cookies

.cdc.gov11

first-party · 9 persistent · 2 session

_ga

10 cookie names hidden because unreviewed names can contain identifiers. Cookie values are never recorded.

Storage

sessionStorage4

4 keys · 4 bytes recorded

4 storage keys hidden because unreviewed keys can contain identifiers. Values are not stored; only byte counts are kept.

Browser Behavior Signals

canvas.toDataURL1 call

Methodology

Schema: v1 schema · facts legacy-derived · descriptive report
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Playwright: 1.62.1
Browser: 151.0.7922.34
Timezone: UTC
Headless: yes
Viewport: 1440×980
GPC: configured off · readback not recorded
Egress: github-actions-ubuntu
Catalog: Hand-curated service catalog
US-biased · hand-curated-2026.08
146 entries
Brave Shields lists: Brave default ad-block lists
31 lists · fetched 9/7/2026

Automated Chromium scan using Playwright 1.62.1 from github-actions-ubuntu with browser 151.0.7922.34, timezone UTC, locale en-US, the listed viewport, and Brave Shields classification only. Brave-list matching uses each route-evaluated request's initiating document (the parent document for a subframe navigation), under methodology shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.1+subject-validity-v3+detector-coverage-v2; main-frame navigations are not blocked or counted as matches, and redirect follow-up URLs that Playwright does not re-route are not independently evaluated. Treat results as reproducible evidence for this scan configuration, not a universal claim about all visitors.

Domain evidence

5 recorded domains

Every domain this visit recorded, with its role, request count and catalog match.
Domain	Role	Requests	Catalog match	Resource types
www.google-analytics.com	service	2	Google: analytics / tag management	fetch
www.googletagmanager.com	service	1	Google: analytics / tag management	script
*.digitalgov.gov	third-party	1	No catalog match	script
www.cdc.gov	first-party	46	No catalog match	document, stylesheet, script, image, font, fetch
*.cdc.gov	first-party	2	No catalog match	fetch

Request log

52 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

Every request row this visit retained, with its time, status, resource type, domain and recorded provenance.
Ref	Time	Status	Type	Domain	Provenance	URL
`B:R0001`	42ms	301	document	www.cdc.gov	Not attributed	https://www.cdc.gov/
`B:R0002`	67ms	200	document	www.cdc.gov	Not attributed	https://www.cdc.gov/…
`B:R0003`	136ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0004`	137ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0005`	137ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0006`	137ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0007`	138ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0008`	139ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0009`	192ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0010`	194ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0011`	200ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0012`	201ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0013`	201ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0014`	201ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0015`	201ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0016`	202ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0017`	203ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0018`	203ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0019`	204ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0020`	204ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0021`	204ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0022`	205ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0023`	205ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0024`	205ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0025`	206ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0026`	206ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0027`	206ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0028`	206ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0029`	207ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0030`	248ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0031`	248ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0032`	248ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0033`	249ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0034`	250ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0035`	251ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0036`	253ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0037`	253ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0038`	253ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0039`	254ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0040`	254ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0041`	359ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0042`	431ms	200	fetch	*.cdc.gov	initiated by www.cdc.gov	https://*.cdc.gov/…
`B:R0043`	431ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0044`	432ms	200	fetch	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0045`	432ms	200	fetch	*.cdc.gov	initiated by www.cdc.gov	https://*.cdc.gov/…
`B:R0046`	438ms	200	fetch	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0047`	451ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0048`	474ms	200	script	*.digitalgov.gov	initiated by www.cdc.gov	https://*.digitalgov.gov/…
`B:R0049`	474ms	200	script	www.googletagmanager.com	initiated by www.cdc.gov	https://www.googletagmanager.com/…?id
`B:R0050`	657ms	204	fetch	www.google-analytics.com	initiated by www.googletagmanager.com	https://www.google-analytics.com/…?v&tid&…&cid
`B:R0051`	667ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`B:R0052`	5,657ms	204	fetch	www.google-analytics.com	initiated by www.googletagmanager.com	https://www.google-analytics.com/…?v&tid&…&cid

Brave-list blocking — evidence

2026-09-07T05:00:32.677Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Attributed requests: 1
Not attributable: 0
Third-party requests: 1

1 third-party requests: 1 attributed to a single recorded actor, 0 not attributable.

Select a relationship to see its detail and open the rows behind it.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.

Requests471 third-party

Blocked by Brave lists3engine blocks reported by this visit; no engine readback recorded

Third-party domains10 distinct catalogued service entities

Cookies90 third-party

Storage keys44 keys privacy-filtered; values omitted

Fingerprint API calls11 API family

GPC signalConfigured offreadback not recorded

Duration2.6s5:00:32 AM UTC

Request composition & timeline

First-party requests 46

Other third-party requests 1

Catalog-matched third-party requests 0

47 requests were recorded from 53 ms to 547 ms. Open the request log for exact timing and request details.

0 ms547 ms

Top Third Parties

*.digitalgov.govoperator unidentified

Advertising Pixels

This legacy report did not record pixel evidence; an empty display is not an absence finding.

Cookies

.cdc.gov9

first-party · 7 persistent · 2 session

9 cookie names hidden because unreviewed names can contain identifiers. Cookie values are never recorded.

Storage

sessionStorage4

4 keys · 4 bytes recorded

4 storage keys hidden because unreviewed keys can contain identifiers. Values are not stored; only byte counts are kept.

Browser Behavior Signals

canvas.toDataURL1 call

Methodology

Schema: v1 schema · facts legacy-derived · descriptive report
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Playwright: 1.62.1
Browser: 151.0.7922.34
Timezone: UTC
Headless: yes
Viewport: 1440×980
GPC: configured off · readback not recorded
Egress: github-actions-ubuntu
Catalog: Hand-curated service catalog
US-biased · hand-curated-2026.08
146 entries
Brave Shields lists: Brave default ad-block lists
31 lists · fetched 9/7/2026

Automated Chromium scan using Playwright 1.62.1 from github-actions-ubuntu with browser 151.0.7922.34, timezone UTC, locale en-US, the listed viewport, and Brave Shields block simulation. Brave-list matching uses each route-evaluated request's initiating document (the parent document for a subframe navigation), under methodology shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.1+subject-validity-v3+detector-coverage-v2; main-frame navigations are not blocked or counted as matches, and redirect follow-up URLs that Playwright does not re-route are not independently evaluated. Treat results as reproducible evidence for this scan configuration, not a universal claim about all visitors.

Domain evidence

2 recorded domains

Every domain this visit recorded, with its role, request count and catalog match.
Domain	Role	Requests	Catalog match	Resource types
*.digitalgov.gov	third-party	1	No catalog match	script
www.cdc.gov	first-party	46	No catalog match	document, stylesheet, script, image, font, fetch

Request log

47 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

Every request row this visit retained, with its time, status, resource type, domain and recorded provenance.
Ref	Time	Status	Type	Domain	Provenance	URL
`V:R0001`	53ms	301	document	www.cdc.gov	Not attributed	https://www.cdc.gov/
`V:R0002`	92ms	200	document	www.cdc.gov	Not attributed	https://www.cdc.gov/…
`V:R0003`	134ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0004`	134ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0005`	134ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0006`	134ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0007`	135ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0008`	135ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0009`	163ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0010`	184ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0011`	188ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0012`	190ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0013`	190ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0014`	191ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0015`	192ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0016`	193ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0017`	193ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0018`	195ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0019`	195ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0020`	195ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0021`	196ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0022`	196ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0023`	196ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0024`	196ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0025`	196ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0026`	197ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0027`	197ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0028`	197ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0029`	197ms	200	stylesheet	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0030`	234ms	200	image	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0031`	234ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0032`	238ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0033`	239ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0034`	239ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0035`	239ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0036`	240ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0037`	240ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0038`	240ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0039`	241ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0040`	241ms	200	font	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0041`	386ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0042`	435ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0043`	436ms	200	fetch	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0044`	442ms	200	fetch	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0045`	461ms	200	script	*.digitalgov.gov	initiated by www.cdc.gov	https://*.digitalgov.gov/…
`V:R0046`	487ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…
`V:R0047`	547ms	200	script	www.cdc.gov	initiated by www.cdc.gov	https://www.cdc.gov/…

This versioned report is currently retained in the public corpus. Follow the currently retained site history, repeat the same public route when it is available, or request a transparent evidence correction.

Integrity and provenance

Evidence receipt

Open report JSON Open provenance sidecar Printable version Download PDF + evidence Open PDF

Report ID: 20260907-c0a6ff7738dbdbed7f1f015bb68b68d3
Site: www.cdc.gov
Latest visit: Sep 7, 2026, 5:00 AM UTC
Schema: v1 schema · facts legacy-derived · descriptive report

Verify recorded provenance

Baseline visit

Started: Sep 7, 2026, 5:00 AM UTC
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Browser: 151.0.7922.34
Redaction: not recorded by this schema
Provenance: Exact build and instrument digests were not recorded by this legacy schema.

Variant visit

Started: Sep 7, 2026, 5:00 AM UTC
Run quality: complete; derived from status and warnings
Scanner: playwright-chromium
Browser: 151.0.7922.34
Redaction: not recorded by this schema
Provenance: Exact build and instrument digests were not recorded by this legacy schema.

Recorded provenance is self-reported measurement metadata, not a cryptographic attestation. The public versioned report JSON contains the retained public evidence; see the methodology for interpretation and retention limits.

This report covers what the scanner measures, not everything a site can do. 16 browser surfaces are not instrumented at all (Every page except the one that was scanned; Anything that only loads after scrolling or interaction; Why a request happened, as a causal chain; and 13 others), 3 capabilities are declined by policy, and 3 are outside what any single visit can see. Their absence from this report is not evidence that they did not occur. Read the published coverage boundary.

Detector accuracy is unmeasured. No calibration study currently publishes a precision or recall for the detectors on this page, so a detector match here is a recorded observation, not a calibrated classification. How detector accuracy is measured.

Approved use boundary: This report is investigative evidence that requires independent corroboration. It is not a standalone legal determination and not the sole exhibit in a legal proceeding. Recorded in this project's release manifest on 2026-08-02.

Brave-list blocking off/on comparison

cdc.gov recorded 3 fewer third-party requests in the visit configured for Brave-list blocking.

What this visit means

Bottom line: this visit has review-worthy signals

5 requests matched Brave Shields filter lists

Lower values observed across comparable metrics in the Brave-list blocking attempt

Privacy policy read; it made no statement this scan can check

Catalogued service domains recorded responses during this visit

Requests were dispatched to catalogued major-platform domains

Google Analytics present, no remarketing signal

No third-party cookies observed

Fingerprint-like browser APIs were called

No blocking → Brave-list blocking delta

Largest per-domain request-count changes

Domains only with Brave-list blocking

Domains only with No blocking

Visible cookie names only with Brave-list blocking

Visible cookie names only with No blocking

Visible storage keys only with Brave-list blocking

Visible storage keys only with No blocking

Entities only with Brave-list blocking

Entities only with No blocking

Measurement limits

How to use this report

Request attribution map

Relationships shown in the request attribution map

Request composition & timeline

Domain evidence

Request log

Request attribution map

Relationships shown in the request attribution map

Request composition & timeline

Domain evidence

Request log

Evidence receipt

Baseline visit

Variant visit