Site Behavior LabSee what a site does, not just what it says.

Baseline visit v2 schema (r2)

cdc.gov

https://www.cdc.gov/

Aug 14, 2026, 7:21 PM UTC

complete; recorded by the scanner

What this actually means

cdc.gov contacted catalogued Google domains during this visit.

1 distinct catalogued tracking-service entity recorded responses across 3 cross-site domains. A catalog match identifies the service domain, not why the request occurred or what it carried.

1tracking-service entity
4cross-site requests

Detailed evidence

Open the interactive evidence explorer

Load request rows, domains, cookies, storage, browser signals, visit phases, charts, and CSV export only when you need them. The versioned report JSON remains available above without this interface.

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

Report ID
20260814-40b1cc683125ef9beb03219fbe1e60b0
Site
cdc.gov
Latest visit
Schema
v2 schema (r2)
Verify recorded provenance

Baseline visit

Started
Run quality
complete; recorded by the scanner
Scanner
playwright-chromium
Browser
151.0.7922.34
Redaction
version 4
Methodology
shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.1+subject-validity-v2+detector-coverage-v2+phase-kernel-v2+boundary-state-v1+consent-r2-v4+resource-budget-v1+proxy-traffic-v1+service-worker-block-v1+detector-accountability-v1+service-role-taxonomy-v1
Detector registry
node-detectors-v4100de91713270067dff4f5ecebeea61d330982c7a5aa33395bae3dd604adedd2
Tracker catalog digest
e94970de235fc80254de8ed99b94316a252e52aa1c2e748c8fbfc3c093b908f4
Brave-list instrument
engine adblock-rust-0.13.20f52cc524a8999a1022279aca74003ece9720f267bc678430727b7312d43f0ac
Normalization
redaction-v4+allowlists-v3:269f631f04090ce582644ee3cf0e5c5b6bb425dc4929bc283607b808bc9322a9+public-string-policy-v3:6c78c05523e1f16c88264d0144af33587bd6dc11e04d337a6af2d58190639266+tldts@7.4.10+node-evidence-policy-v1+r2-http-status-compat-v1

Variant visit

Started
Run quality
complete; recorded by the scanner
Scanner
playwright-chromium
Browser
151.0.7922.34
Redaction
version 4
Methodology
shields-request-context-v2-adblock-rust-0.13.2-request-method-v1-playwright-1.62.1+subject-validity-v2+detector-coverage-v2+phase-kernel-v2+boundary-state-v1+consent-r2-v4+resource-budget-v1+proxy-traffic-v1+service-worker-block-v1+detector-accountability-v1+service-role-taxonomy-v1
Detector registry
node-detectors-v4100de91713270067dff4f5ecebeea61d330982c7a5aa33395bae3dd604adedd2
Tracker catalog digest
e94970de235fc80254de8ed99b94316a252e52aa1c2e748c8fbfc3c093b908f4
Brave-list instrument
engine adblock-rust-0.13.20f52cc524a8999a1022279aca74003ece9720f267bc678430727b7312d43f0ac
Normalization
redaction-v4+allowlists-v3:269f631f04090ce582644ee3cf0e5c5b6bb425dc4929bc283607b808bc9322a9+public-string-policy-v3:6c78c05523e1f16c88264d0144af33587bd6dc11e04d337a6af2d58190639266+tldts@7.4.10+node-evidence-policy-v1+r2-http-status-compat-v1

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. 14 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 11 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. A study has been recorded for pixel-events and does not support a published rate under the current build. 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 .