FluWatch

BE A FLU FIGHTER!

MARYLAND RESIDENTS:   

We Need Your Help!

Maryland residents can now help DHMH track influenza activity in Maryland. Click here to read all about the program. ​

 
​​​​​​

DHMH FluWatch

​​​​​​

Welcome to the influenza surveillance reporting website, brought to you by the Division of Infectious Disease Surveillance in the Center for Surveillance, Infection Prevention, and Outbreak Response at the Maryland Department of Health and Mental Hygiene (DHMH).

​​​

CURRENT WEEK INFLUENZA ACTIVITY SUMMARY

During the week ending February 18, 2017 (MMWR Week 7), influenza-like illness (ILI) intensity was HIGH and there was WIDESPREAD geographic spread of influenza.

Click here to view the Weekly Influenza Report​

(Reports are updated by close-of-business on Fridays unless otherwise noted.)


​INFLUENZA SURVEILLANCE INDICATORS

ILI INTENSITY:
One indicator we look at is the proportion of visits to sentinel providers for ILI.  Intensity is measured against a baseline proportion of visits on a scale of minimal, low, moderate, and high. 

​Week Ending ​Intensity Level
​February 18, 2017 ​High
​February 11, 2017 High​
​February 4, 2017 ​Low
​January 28, 2017 Moderate​​
​January 21, 2017 ​Low
​January 14, 2017 ​Minimal
​January 7, 2017 Minimal​
​December 31, 2016 ​Minimal
​December 24, 2016 Minimal​
​December 17, 2016 Minimal​
​December 10, 2016 ​Minimal
​December 3, 2016 Minimal​
​November 26, 2016 ​Minimal
​November 19, 2016 ​Minimal
​November 12, 2016 ​Minimal
​November 5, 2016 ​​Minimal
​October 29, 2016 ​Minimal
​October 22, 2016 ​Minimal
​October 15, 2016 ​Minimal
October 8, 2016​ ​Minimal
 

GEOGRAPHIC ACTIVITY:
A second indicator we look at is the geographic spread of influenza activity.  By looking at where sentinel providers are reporting ILI, where influenza and ILI outbreaks are occurring, and from where specimens are being submitted for testing, we can tell whether influenza is not active, sporadic, local, regional, or widespread.  This is not an indicator of disease severity, only of where the disease is located in Maryland.

​Week Ending ​Activity Level
​February 18, 2017 ​Widespread
​February 11, 2017 ​Widespread
​February 4, 2017 Widespread​
​January 28, 2017 Widespread​
​January 21, 2017 ​Widespread
​January 14, 2017 ​Widespread
​January 7, 2017 ​Widespread
​December 31, 2016 ​Regional
​December 24, 2016 ​Regional
​December 17, 2016 Local​​
​December 10, 2016 ​Sporadic
​December 3, 2016 Local​
​November 26, 2016 ​Sporadic
​November 19, 2016 ​Sporadic
​November 12, 2016 ​Local
​November 5, 2016 Sporadic​
​October 29, 2016 ​Sporadic
​October 22, 2016 ​Sporadic
​October 15, 2016 ​Sporadic
​October 8, 2016​ ​Sporadic


PREDOMINANT INFLUENZA STRAIN:
A third indicator we look at is the predominant strain of influenza circulating in Maryland.  This is important because different strains have different implications for the community.  For example, a "novel" or "variant" strain will not have a vaccine available.  There are also some strains of influenza that have developed resistance to antiviral medication.  And there are some strains that will not match the strains in the seasonal flu vaccine.  Knowing what is circulating​ is important in planning and responding to influenza outbreaks.  Refer to the weekly report for a full breakdown of the PCR test results reported.

​Week Ending Predominant Strain
​February 18, 2017 ​Type A (H3)
​February 11, 2017 ​Type A (H3)
​February 4, 2017 ​Type A (H3)
​January 28, 2017 Type A (H3)​
​January 21, 2017 ​Type A (H3)
​January 14, 2017 ​Type A (H3)
​January 7, 2017 ​Type A (H3)
​December 31, 2016 Type A (H3)​
​December 24, 2016 ​Type A (H3)
​December 17, 2016 ​​Type A (H3)
​December 10, 2016 ​Type A (H3)
​December 3, 2016 Type A (H3)​
​November 26, 2016 Type A (H3)​
​November 19, 2016 Type A (H3)​
​November 12, 2016 ​Type A (H3)
​November 5, 2016 Type A (H3) / Type B​
​October 29, 2016 ​​Type A (H3)
​October 22, 2016 ​Type A (H3)
​October 15, 2016 ​N/A
​October 8, 2016​ ​Type A (H1)


PREVIOUS WEEKLY REPORTS

​Weekly Ending ​File
​February 11, 2017 PDF
​February 4, 2017 PDF
​January 28, 2017 PDF
​January 21, 2017 PDF
​January 14, 2017 PDF
​January 7, 2017 PDF
​December 31, 2016 PDF
​December 24, 2016 PDF
​December 17, 2016 PDF
​December 10, 2016 PDF
​December 3, 2016 PDF
​November 26, 2016 PDF
​November 19, 2016 ​No Report (Holiday)
November 12, 2016​ PDF
​November 5, 2016 PDF
​October 29, 2016 PDF
​October 22, 2016 PDF
​October 15, 2016 PDF
​October 8, 2016 PDF
 

REVIOUS SEASON SUMMARIES


​Season ​File
2015-2016 PDF
​2014-2015 PDF
​2013-2014 PDF
​2012-2013 PDF
​2011-2012 PDF
​2010-2011 PDF