Delphi’s COVID-19 Data Sources and Signals
Delphi’s COVID-19 Surveillance Streams data includes the following data sources.
Data from these sources is expected to be updated daily. You can use the
covidcast_meta
API endpoint to get summary information
about the ranges of the different attributes for the different data sources.
The API for retrieving data from these sources is described in the COVIDcast API endpoint documentation. Changes and corrections to data in this API are listed in the API changelog.
To obtain many of these signals and update them daily, Delphi has written extensive software to obtain data from various sources, aggregate the data, calculate statistical estimates, and format the data to be shared through the COVIDcast API. This code is open source and available on GitHub, and contributions are welcome.
COVIDcast Map Signals
The following signals are currently displayed on the public COVIDcast map and available in its data export tool:
Kind | Name | Source | Signal |
---|---|---|---|
Public Behavior | At Away Location 6hr+ | safegraph |
full_time_work_prop_7dav |
Public Behavior | At Away Location 3-6hr | safegraph |
part_time_work_prop_7dav |
Public Behavior | Bar Visits | safegraph |
bars_visit_prop |
Public Behavior | Restaurant Visits | safegraph |
restaurant_visit_prop |
Public Behavior | People Wearing Masks | fb-survey |
smoothed_wearing_mask_7d |
Public Behavior | Vaccine Acceptance | fb-survey |
smoothed_covid_vaccinated_or_accept |
Public Behavior | COVID Symptom Searches on Google | google-symptoms |
sum_anosmia_ageusia_smoothed_search |
Early Indicators | COVID-Related Doctor Visits | doctor-visits |
smoothed_adj_cli |
Early Indicators | COVID-Like Symptoms | fb-survey |
smoothed_cli |
Early Indicators | COVID-Like Symptoms in Community | fb-survey |
smoothed_hh_cmnty_cli |
Late Indicators | COVID Antigen Test Positivity (Quidel) | quidel |
covid_ag_smoothed_pct_positive |
Late Indicators | Claims-Based COVID Hospital Admissions | hospital-admissions |
smoothed_adj_covid19_from_claims |
Late Indicators | Cases | indicator-combination |
confirmed_7dav_incidence_num |
Late Indicators | Cases per 100,000 People | indicator-combination |
confirmed_7dav_incidence_prop |
Late Indicators | Deaths | indicator-combination |
deaths_7dav_incidence_num |
Late Indicators | Deaths per 100,000 People | indicator-combination |
deaths_7dav_incidence_prop |
All Available Sources and Signals
Beyond the signals available on the COVIDcast map, numerous other signals are available directly through the API:
Table of contents
- COVID Act Now
- Change Healthcare
- Department of Health & Human Services
- Doctor Visits
- Google Search Trends symptoms dataset
- Hospital Admissions
- Indicator Combination
- JHU Cases and Deaths
- NCHS Mortality Data
- Quidel
- SafeGraph
- Symptom Surveys
- USAFacts Cases and Deaths