Weekly Flu Report, April 23, 2021

Massachusetts Department of Public Health weekly influenza update

Table of Contents

This week's report


  • ​​​Influenza severity for Massachusetts is low this week.
  • The percent of influenza-like illness (ILI) visits in Massachusetts is 0.55%, which is lower than the previous two seasons in the same week.
  • The percent of hospitalizations associated with influenza is 0.02%, which is lower than the previous two seasons in the same week.
  • Overall ILI activity is minimal. All regions are reporting minimal ILI activity.
  • More influenza B than influenza A positive specimens have been reported by hospitals and outpatient facilities in Massachusetts.
  • Nationally, flu activity is low.
  • Additional statewide and national data including geographic spread, ILI activity, and pneumonia and influenza mortality are available at CDC’s FluView Weekly Report at www.cdc.gov/flu/weekly and FluView Interactive https://www.cdc.gov/flu/weekly/fluviewinteractive.htm.
  • Statewide and national COVID data are available at

https://www.mass.gov/info-details/covid-19-response-reporting and   


Flu vaccination is always the best way to prevent flu and its potentially serious complications

Additional Resources

Date published: April 23, 2021

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