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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 May 23, 2015, influenza-like illness (ILI) intensity was MINIMAL and there was SPORADIC 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​​
​May 16, 2015 PDF
​May 9, 2015 PDF
​May 2, 2015 PDF
​April 25, 2015 PDF
April 18, 2015​ PDF
​April 11, 2015  PDF
​April 4, 2015 PDF
​March 28, 2015 PDF
March 21, 2015 PDF
​March 14, 2015 PDF
​March 7, 2015 PDF
​February 28, 2015
PDF
Feb​ruary 21, 2015​​​ PDF
​February 14, 2015
PDF
​February 7, 2015
PDF
​January 31, 2015 PDF
​January 24, 2015​ PDF
​January 17, 2015 PDF
January 10, 2015
PDF
 January 3​, 2015​ PDF
​December 27, 2014 PDF
​December 20, 2014
​No Report (Holiday)
​December 13, 2014 PDF
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
​2013-2014 PDF
2012-2013 PDF
​2011-2012 PDF
​2010-2011 PDF
2009-2010 PDF
​2008-2009 PDF
​2007-2008 PDF
 

 

 

​​​​
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
​May 23, 2015 ​Minimal
​May 16, 2015 ​Minimal
​May 9, 2015 ​Minimal
​May 2, 2015 ​Minimal
April 25, 2015​ Minimal​​
​April 18, 2015 ​Minimal
April 11, 2015​ Minimal​
​April 4, 2015 ​Minimal
​March 28, 2015 MInimal​​
​March 21, 2015 ​Minimal
​March 14, 2015 ​Minimal
​March 7, 2015 ​Minimal
February 28, 2015​ Minimal​
​February 21, 2015 ​Minimal
​February 14, 2015 ​Minimal
​February 7, 2015 ​Minimal
January 31, 2015​​ Low​​
​January 24, 2015 ​Low
​January 17, 2015 Moderate​
​January 10, 2015 Moderate​​
​January 3, 2015 ​High
​December 27, 2014 ​High
​December 20, 2014 ​High
​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
​May 23, 2015 ​Sporadic
​May 16, 2015 ​Sporadic
​May 9, 2015 ​Sporadic
​May 2, 2015 ​Local
April 25, 2015​ Local​​
​April 18, 2015 ​Regional
​April 11, 2015 Regional
​April 4, 2015
​Widespread
​March 28, 2015​ Local​​
​March 21, 2015 ​Local
​March 14, 2015
​Local
​March 7, 2015 ​Local
February 28, 2015​ Widespread​
​February 21, 2015
​Widespread
​February 14, 2015
​Widespread
​February 7, 2015
​Widespread
​January 31, 2015​ Widespread​
​January 24, 2015 ​Widespread
​January 17, 2015 ​Widespread
​January 10, 2015 Widespread​
​January 3, 2015
​Widespread
​December 27, 2014 ​Widespread
​December 20, 2014 ​Widespread
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
​May 23, 2015 ​B
​May 16, 2015 ​B
​May 9, 2015 ​B
​May 2, 2015 ​N/A
April 25, 2015​ B​​
​April 18, 2015 ​B
​April 11, 2015 B​
​April 4, 2015 ​B
March 28, 2015​ ​B
​March 21, 2015
​B
​March 14, 2015
​A (H3)
​March 7, 2015 ​B
February 28, 2015​ ​A (H3)​
​February 21, 2015 ​A (H3)
​February 14, 2015 ​A (H3)
​February 7, 2015 ​A (H3)
January 31, 2015​​ ​A (H3)​
​January 24, 2015
​A (H3)
​January 17, 2015
​A (H3)
​January 10, 2015 A (H3)​
​January 3, 2015
​A (H3)
​December 27, 2014 ​A (H3)
​December 20, 2014 ​A (H3)
​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