FAQ: COVID-19 Data and Surveillance

Public health surveillance is the ongoing, systematic collection, analysis, and interpretation of health-related data essential to planning, implementation, and evaluation of public health practice.

For surveillance of COVID-19 and the virus that causes it, SARS-CoV-2, CDC is using multiple surveillance systems in collaboration with state, local, territorial, academic, and commercial partners to monitor COVID-19 in the United States. COVID-19 surveillance draws from a combination of data sources using existing influenza and viral respiratory disease surveillance, syndromic surveillance, case reporting, lab reporting, the healthcare safety system, ongoing research platforms, and other new surveillance systems designed to answer specific questions. The data from these systems, combined, create an updated picture of COVID-19’s spread and its effects in the United States and are used to inform the U.S. national public health response to COVID-19.

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