FluWatch

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MDH FluWatch​
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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 (MDH).
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CURRENT WEEK INFLUENZA ACTIVITY SUMMARY
During the week ending November 11, 2017 (MMWR Week 45), influenza-like illness (ILI) intensity was MINIMAL and there was LOCAL geographic spread of influenza.
(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
​​November 11, 2017
​Minimal
November 4, 2017
​Minimal
​​October 28, 2017
​Minimal
​​October 21, 2017
​Minimal
​​October 14, 2017
​Minimal
​​October 7, 2017
​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
November 11, 2017
Local
November 4, 2017
Sporadic
October 28, 2017
Sporadic
​October 21, 2017
Sporadic
​October 14, 2017
Sporadic
​October 7, 2017
​No Activity
 
 
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
November 11, 2017
None
November 4, 2017
None
October 28, 2017
Type A (H3)
​October 21, 2017
​​Type A (H3)
​October 14, 2017
​​Type A (H3)
​October 7, 2017
​​Type A (H3)
 
 
PREVIOUS WEEKLY REPORTS
Week Ending
​File
November 4, 2017
PDF
​October 28, 2017
PDF
October 21, 2017
PDF
October 14, 2017
PDF
​October 7, 2017
PDF
 
 
PREVIOUS SEASON SUMMARIES 
​Season
​File
2015-2016
PDF
​2014-2015
PDF
​2013-2014
PDF
​2012-2013
PDF
​2011-2012
PDF
​2010-2011
PDF