Data · dataset · 2024
CDC Epidemic Trends and Rt
Listed in data.cdc.gov
Description
An archive of estimated trend categories, probabilities of epidemic growth, and Rt, updated weekly for COVID-19 and flu. Estimates are based on emergency department visits reported to the National Syndromic Surveillance Program (NSSP), and generated using a model that includes nowcasting to adjust for incomplete reports on the most recent dates. See the visuals supported by these data, and more information about the data, models and methods at cdc.gov/cfa-modeling-and-forecasting/rt-estimates/index.html, and cdc.gov/respiratory-viruses/data/activity-levels.html.
For a semi-technical overview of the modeling methods used to generate these estimates see cdc.gov/cfa-behind-the-model/php/data-research/rt-estimates/index.html.
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Note
On June 1, 2026 the modeling methods used to generate these estimates changed. For `as_of` dates prior to 2026-06-01, estimates were generated using a semi-mechanistic Bayesian model run using the R package EpiNow2. Models were run independently in each state.
Source code is available at github.com/CDCgov/cfa-epinow2-pipeline. For `as_of` dates after 2026-06-01, estimates were generated using a hierarchical generalized additive model (HGAM) in which data were spatially partially pooled. Methods details are available at cdc.gov/cfa-behind-the-model/php/data-research/rt-estimates/index.html
Links
Get the data
- CSV data.cdc.gov/api/views/5dqz-y4ea/rows.csv?accessType=DOWNLOAD ↗
download · from data cdc gov
Where it is published
- data.cdc.gov dataset page data.cdc.gov/Public-Health-Surveillance/CDC-Epidemic-Trends-and-Rt/5dqz-y4ea ↗
landing page · from data cdc gov
Catalogue records · 1
- SODA API data.cdc.gov/resource/5dqz-y4ea.json ↗
metadata API · from data cdc gov
Topics
- Stated by source
- Public Health Surveillance
- From keywords
- Medicine & Health
- Inferred from text
- Epidemiology 71%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| data.cdc.gov | 5dqz-y4ea | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · data cdc gov | connector:data_cdc_gov@1.0.0 | |
| concepts[field].anzsrc:group:4202 | enrichment · data cdc gov | taxonomy-embedding@1.1.0 | title+keywords+description (71%) |
| concepts[field].local:field:medicine-health | mapping · data cdc gov | connector:data_cdc_gov@1.0.0 | |
| concepts[topic].socrata_category:data_cdc_gov:public-health-surveillance | source · data cdc gov | connector:data_cdc_gov@1.0.0 | |
| created_date | source · data cdc gov | connector:data_cdc_gov@1.0.0 | |
| description | source · data cdc gov | connector:data_cdc_gov@1.0.0 | /resource/description |
| publication_date | source · data cdc gov | connector:data_cdc_gov@1.0.0 | |
| title | source · data cdc gov | connector:data_cdc_gov@1.0.0 | /resource/name |
| updated_date | source · data cdc gov | connector:data_cdc_gov@1.0.0 |