Flu Watch - Data, Reports, Maps

2021 - 22 S.C. Flu Activity & Surveillance

The format of Flu Watch, the weekly summary of influenza activity in South Carolina has been revised. Positive rapid antigen detection tests are no longer required to be reported. An evaluation of the current influenza surveillance system shows removing the requirement for reporting positive rapid antigen detection tests does not compromise the virologic surveillance of influenza in SC. The map shown below provides an assessment of the change in influenza activity comparing the current and previous weeks overall and by public health region. Definitions and descriptions of the South Carolina influenza surveillance components are provided in a separate document below.

Week of September 18 – September 24, 2022 (MMWR Week 38): N/A

Read the complete Flu Watch: South Carolina's Weekly Surveillance Report - (PDF):
Updated September 28, 2022

View the full Flu Watch for MMWR Wk. 38

Past Reports

U.S. Flu Activity

Visit the Center for Disease Control and Prevention's (CDC) website for national statistics on flu.

International Flu Activity

Visit the World Health Organization's (WHO) website for global flu activity updates.

What is Influenza (Flu) Surveillance?

Each year, DHEC and U.S. public health experts monitor influenza (flu) and other diseases. This activity is called disease surveillance.

Influenza (flu) surveillance allows DHEC and the CDC to see what impact flu is having on the health of residents. Surveillance helps us to:

  • Determine whether the influenza virus is what is causing flu-like symptoms (Sometimes other conditions have influenza-like symptoms but are not influenza.);
  • Understand which new flu viruses are circulating in South Carolina (The types of influenza virus that infect people often change from one flu season to the next.);
  • Tell us when the influenza virus first appears in the state and also when it decreases;
  • Determine where in the state the influenza virus is circulating; and
  • Understand what types of vaccines are most likely to succeed the following year.

In South Carolina, influenza surveillance consists of several components. Each component provides different types of information about influenza; together, they create a solid overview of influenza activity in the state.

Related Information


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