This week’s report


  • Influenza severity for Massachusetts has increased from low to moderate this week.
  • The percentage of influenza-like illness visits for Massachusetts is higher than the previous two years in the same week.
  • Overall influenza-like illness activity for Massachusetts has increased from moderate to high this week. The West region is reporting moderate ILI activity while all other regions are reporting high ILI activity.
  • The percent of influenza-associated hospitalizations in Massachusetts is lower than the previous two years in the same week.
  • In the 2019-2020 flu season, more influenza B than influenza A positive specimens have been reported by hospitals and outpatient facilities in Massachusetts.
  • Nationally, influenza illness activity is increasing and influenza B is most common.
  • Additional statewide and national data including geographic spread, ILI activity, and pneumonia and influenza mortality are available at CDC’s FluView Weekly Report at and FluView Interactive

Flu activity is increasing. 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 3, 2020