Weekly Flu Report, January 21, 2022

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 1.97%, which is slightly lower than the regional baseline of 2.0%.
  • The percent of hospitalizations associated with influenza is 0.17%, which is lower than three of the previous seasons in the same week.
  • Overall ILI activity is low. Inner Metro Boston, Northeast, and West regions are reporting minimal ILI activity; Boston and Outer Metro Boston regions are reporting low ILI activity; Central and Southeast regions are reporting moderate ILI activity. 
  • More influenza A than influenza B positive specimens have been reported by hospitals and outpatient facilities in Massachusetts. For influenza A, the predominant strain is currently H3N2.
  • Nationally, influenza activity declined slightly again this week but remains elevated and is expected to continue for several weeks.
  • 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   


It’s not too late to get vaccinated. Flu vaccination is always the best way to prevent flu and its potentially serious complications.

Additional Resources

Date published: January 21, 2022

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