The initiative captures information on patients diagnosed with respiratory illness or SARS-CoV-2, providing details on demographics, comorbidity and treatment. Data is collected from 40 sites participating in PCORnet, the National Patient-Centered Clinical Research Network.


  • Develop partnership between CDC, PCORnet and PHII for COVID-19 surveillance using data from electronic health records
  • Maintain and update a filtered common data model of patients with respiratory illnesses and SARS-CoV-2 testing every two weeks
  • Respond to queries every two weeks to assess patients with COVID-19 diagnoses, influenza diagnoses and SARS-CoV-2 testing
  • Respond to advanced analytic queries focused on predictors of admission/readmission, disease severity and COVID-19 sequelae

key partners and roles

  • The Centers for Disease Control and Prevention (CDC) serves as the project sponsor.
  • PHII, a program of the Task Force for Global Health, provides project management, contract management and communications support.
  • Harvard Pilgrim Health Care (HPHC) serves as the data coordinating center and leads development, execution and generation of surveillance queries. HPHC also captures data for advanced analytics.
  • Louisiana Public Health Institute (LPHI) provides strategic direction and support for the initiative and contributes data for surveillance queries.


August bi-monthly webinar (August 23, 2021): The August webinar provided an update on query results, the query timeline for the remainder of 2021, details on the vaccine- and delta-focused queries, and progress on manuscripts in development.

June’s webinar provided an update on current and future queries, manuscripts and other publications under developement and details for the scope for the second year of the project. 

*Note: The June webinar recording and transcript contain data that have not been shared publicly. Once that data has been made public, the webinar and transcript will be made available.

The third bi-monthly webinar provided an overview of the project’s accomplishments, a status update on continuation funding, and plans for future queries and disseminating results.

The project team hosted its second bi-monthly webinar to update partners on recent query data, share plans for future  queries being developed and discuss dissemination methods to communicate query results.

The project team hosted a webinar to share details on the project objectives and timeline, as well as to introduce key partners and roles.

Query schedule

Queries will be sent to sites every two weeks. The first query per month will examine characteristics of patients with COVID-19 cumulatively since the beginning of the pandemic. The second query per month will be split between short window look-backs and other queries examining discrete questions that emerge as CDC priorities. A tentative schedule is provided below.

February 2021

CDC COVID Query Schedule


Query Release Day: January 27
Query: Long COVID query


Query Release Day: February 10
Query: Cumulative query

Query Release Day: March 1
Query: Chronic disease control query

December 2020

CDC COVID Query Schedule


Query Release Week: November 30


Query Release Week: December 14


Query Release Week: January 4, January 18


Query Release Week: February 1, February 16

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Harvard Pilgrim Health Care