Navigation Links
Dry Weather Boosts Odds of Flu Outbreaks
Date:2/23/2010

Lower levels of water in cold winter air tied to more influenza, study suggests

TUESDAY, Feb. 23 (HealthDay News) -- Rain and snow may seem like perfect incubators for the flu, but new research suggests that low humidity and unusually dry skies might be responsible for increases in influenza, such as those that occur during winter months.

Previous research has suggested that humidity is connected to seasonal epidemics of flu, but studies have usually focused on relative humidity, as opposed to absolute humidity. Relative humidity, which varies with temperature, is the ratio of water vapor content in the air to the saturating level. Absolute humidity, which is the actual level of water in the air, does not depend on temperature, but often reaches lower levels in the winter than in the summer.

"In some areas of the country, a typical summer day can have four times as much water vapor as a typical winter day -- a difference that exists both indoors and outdoors," Jeffrey Shaman, an Oregon State University atmospheric scientist and lead author of the new study, said in a news release from the Public Library of Science.

Shaman and his colleagues created a mathematical model of influenza and plugged 31 years of absolute humidity data into it. They found that influenza outbreaks in the winter often happened right after a period of unusually dry weather, according to their report published online Feb. 22 in PLoS Biology.

"This dry period is not a requirement for triggering an influenza outbreak, but it was present in 55 to 60 percent of the outbreaks we analyzed so it appears to increase the likelihood of an outbreak," Shaman said. "The virus response is almost immediate; transmission and survival rates increase and about 10 days later, the observed influenza mortality rates follow."

Irene Eckstrand, of the U.S. National Institute of General Medical Sciences program, explained in the news release: "The discovery of a link between influenza outbreaks and absolute humidity could have a major impact on the development of strategies for limiting the spread of infection. Understanding why outbreaks arise is an important first step toward containing or even preventing them, so it is essential for scientists to follow-up on this intriguing connection."

More information

The U.S. Centers for Disease Control and Prevention has more on the flu.



-- Randy Dotinga



SOURCE: Public Library of Science, news release, Feb. 22, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Cold Weather Can Increase Heart Disease Risks
2. PartsSource Named 2007 Weatherhead 100 Award Winner
3. Spring Weather Brings Flea Season
4. New Anti-Cellulite Treatment Prepares Women for Warmer Weather
5. emebaVet Adds Pet Friendly Forecast From the Weather Channel
6. Warmer Weather Reminds Cat Owners to Protect Against Worms
7. Weather, stomach bugs and climate change: Refining the model
8. Hot Weather Brings Health Risks for Older Illinoisans
9. New Anti-Cellulite Treatment Prepares Women for Warmer Weather and Beyond
10. UCAR weather forecasts aim to reduce African meningitis epidemics
11. Cold Weather Could Spell Bad News for Older Residents in Illinois
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... Oklahoma City, Oklahoma (PRWEB) , ... June 25, ... ... to helping both athletes and non-athletes recover from injury. Recently, he has implemented ... for the Oklahoma City area —Johnson is one of the first doctors to ...
(Date:6/24/2016)... Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... surgery procedures that most people are unfamiliar with. The article goes on to state ... procedures, but also many of these less common operations such as calf and cheek ...
(Date:6/24/2016)... , ... June 24, 2016 , ... Marcy was in a crisis. Her son James, ... out at his family verbally and physically. , “When something upset him, he couldn’t control ... use it. He would throw rocks at my other children and say he was going ...
(Date:6/24/2016)... ... June 24, 2016 , ... Dr. Amanda ... orthodontic treatment. Dr. Cheng has extensive experience with all areas of orthodontics, including ... accelerated osteogenic orthodontics. , Micro-osteoperforation is a revolutionary adjunct to orthodontic treatment. ...
(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. are sharpening ... Talker Award, an essay contest in which patients and their families pay tribute to ... at the 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) this ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Bracket , ... launch its next generation clinical outcomes platform, Bracket eCOA (SM) ... held on June 26 – 30, 2016 in ... first electronic Clinical Outcome Assessment product of its kind to ... #715. Bracket eCOA 6.0 is a flexible platform ...
(Date:6/23/2016)... INDIANAPOLIS , June 23, 2016 ... Tomorrow,s Leaders Scholarship is any indication, the future is ... online at www.diabetesscholars.org by the Diabetes Scholars ... in the way of academic and community service excellence. ... program since 2012, and continues to advocate for people ...
(Date:6/23/2016)... 2016 Revolutionary technology includes multi-speaker ... , industry leaders in advanced audiology and hearing aid ... Opn ™, the world,s first internet connected hearing aid ... devices.      (Photo: http://photos.prnewswire.com/prnh/20160622/382240 ) ... of ,world firsts,: , TwinLink™ - the ...
Breaking Medicine Technology: