The University of Maryland Social Data Science Center Global COVID-19 Trends and Impact Survey, in partnership with Facebook is a partnership between Facebook and academic institutions. The survey is available in 56 languages. A representative sample of Facebook users is invited on a daily basis to report on topics including, for example, symptoms, social distancing behavior, vaccine acceptance, mental health issues, and financial constraints. Facebook provides weights to reduce nonresponse and coverage bias. Country and region-level statistics are published daily via public API and dashboards, and microdata is available for researchers via data use agreements. Over half a million responses are collected daily.
Data for the United States is not included in the Global COVID-19 Trends and Impact Survey but is available at covidcast.cmu.edu

CTIS Data Users: On October 1, 2023, we will be removing EU microdata for the period October 1, 2021-December 31, 2021 as per our data retention requirements.

Aggregated data for EU countries for this time period is available through the Contingency Tables or our Open Data API.


Overview of Survey Design: Partnering with Facebook on a University-based Rapid Turn-around Global Survey
Detailed Methodology: User Guide for the COVID-19 Trends and Impact Survey Weights (updated May 2022)
Survey Limitations: Survey limitations page on Open Data API website


UMD Global CTIS Open Data API

An open API to access aggregated Global CTIS data.

Go to our API

UMD Global CTIS Microdata Repository

Data repository for daily individual survey responses with survey variables and weights.

Go to microdata repo

UMD Global CTIS Contingency Tables

Weekly and monthly pooled aggregate estimates that are broken out by socio-demographic groups.

Go to Contingency Tables

UMD Researchers

Frauke Kreuter

Director of Joint Program in Survey Methodology

Kathleen Stewart

Director of the Center for Geospatial Information Science

Data Engineering

Zheng Liu

Yao Li

Peiqi Zhang

Visualization and API Development

Yao Li

Joe O'Brien

Survey Design and Fielding

Samantha Chiu

Jesse Klein

Wichada La Motte-Kerr

Technical Support

Anil Kommareddy