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fluwatch : Home

​​​​​​Office of Governor 

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

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CURRENT WEEK INFLUENZA ACTIVITY SUMMARY

During the week ending December 13, 2014, influenza-like illness (ILI) intensity was MODERATE and there was WIDESPREAD geographic activity.

Click here to view the Weekly Influenza Report

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

PREVIOUS 2014-15 FLU REPORTS

Week Ending File​​
December​ 6, 2104​​​ PDF
​November 29, 2014 PDF
​November 22, 2014 ​No Report (Holiday)
​November 15, 2014 PDF
​November 8, 2014 PDF
​November 1, 2014 PDF
October 25, 2014​ PDF
​October 18, 2014 PDF
​October 11, 2014 PDF
​October 4, 2014​ PDF
  

 

 

PREVIOUS SEASON SUMMARIES
 

Season ​File
2012-2013 PDF
​2011-2012 PDF
​2010-2011 PDF
2009-2010 PDF
​2008-2009 PDF
​2007-2008 PDF
 

 

 

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INFLUENZA SURVEILLANCE INDICATORS  

INFLUENZA-LIKE ILLNESS INTENSITY:
One of the indicators we look at is the proportion of visits to sentinel providers for influenza-like illness (ILI). Intensity is measured against a baseline proportion of visits on a scale of minimal, low, moderate, and high.

Week Ending
​Intensity Level
​December 13, 2014 Moderate​​
​December 6, 2014 ​Low
​November 29, 2014 ​Minimal
​November 22, 2014 ​Minimal
​November 15, 2014 ​Minimal
​November 8, 2014 ​Minimal
November 1, 2014​ Minimal​
​October 25, 2014 ​Minimal
​October 18, 2014 ​Minimal
October​ 11, 2014​ Minimal​
​October 4, 2014
​Minimal
 

GEOGRAPHIC SPREAD:

A second indicator we look at is the geographic spread of influenza activity. By looking at where sentinel providers are reporting flu-like illnesses 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 ​Geographic Spread
December 13, 2014​ ​Widespread​
​December 6, 2014 ​Widespread
November 29, 2014 ​Widespread
​November 22, 2014 ​Regional
​November 15, 2014
​Local
​November 8, 2014 ​Local
November 1, 2014​​ ​Sporadic​
​October 25, 2014 ​Local
​October 18, 2014 ​Sporadic
October 11, 2014​​ S​poradic​
October 4, 2014 ​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 against it for a while. There are also some strains of influenza that have developed resistance against 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
​December 13, 2014 ​A (H3)​
​December 6, 2014 ​A (H3)
​November 29, 2014
​A (H3)
​November 22, 2014 ​A (H3)
​November 15, 2014 ​A (H3)
​November 8, 2014 ​A (H3)
November 1, 2014​ ​A (H3)
​October 25, 2014 ​A (H3)
​October 18, 2014 ​B
October 11, 2014​ A (H3)
​October 4, 2014 ​B