Current Environment:


This is a prospective observational study using a mobile study platform (app) that is designed for use on Android phones. Study participants will provide baseline demographic and medical information and report symptoms of respiratory infection on a weekly basis using the app. Participants will also report use of prevention techniques on the weekly survey. Mobility data will be collected passively using the sensors on the participant's smartphone, if the participant has granted the proper device permissions. The overall goals of the study are to track spread of coronavirus-like illness (CLI), influenza-like illness (ILI) and non-specific respiratory illness (NSRI) on a near-real time basis and identify specific behaviors associated with an increased or decreased risk of developing these conditions.


Covid19, Influenza, Respiratory Tract Infections, Acute Respiratory Tract Infection, Acute Respiratory Distress Syndrome

Recruitment Status


Eligibility Criteria

Inclusion Criteria:

Adult 18 years or older, Android mobile phone user, Resides in the United States (has a US home address)

Exclusion Criteria:

Under the age of 18, Does not use an Android mobile device, Opts out of sharing mobility data, Does not live within the United States



Min Age

18 Years

Max Age


Download Date

March 7, 2022

Principal Investigator

John Brownstein

Primary Contact Information

For more information on this trial, visit


For more information and to contact the study team:

Wide Scale Monitoring for Acute Respiratory Infection Using a Mobile-Based Study Platform NCT04663776