Navigation Links
H1N1 Flu Spreads Slower Than Seasonal Flu: Study
Date:3/10/2010

Data from Texas households confirm that the virus tends to target children

WEDNESDAY, March 10 (HealthDay News) -- The H1N1 swine flu appears to spread more slowly than "regular" seasonal flu in a household setting, but when it does spread it's more likely to affect children, a new study suggests.

"We found that about 9 percent of people who lived with a household member with [H1N1] flu also got flu," said lead researcher Oliver Morgan, an Epidemic Intelligence Service officer with the U.S. Centers for Disease Control and Prevention.

"We found that 18 percent of children under 5, and 11 percent of children 5 to 18, got flu in the household," Morgan said, adding that children were more likely to introduce flu into the household.

The findings are published in the April issue of the CDC journal Emerging Infectious Diseases.

For the study, Morgan's team began looking at the H1N1 outbreak when it first started in the United States in April and May of 2009. The researchers examined more than 3,400 flu samples from the San Antonio, Texas, area, one of the first sites to experience infections.

The researchers were able to identify 97 cases of pandemic H1N1 flu in 77 households. In about 30 percent of the homes, additional family members became sick within four days of a child coming down with the flu.

The so-called attack rate of the H1N1 flu -- how fast it spreads -- was 4 percent, which is lower than that seen with seasonal flu and lower than what would be expected for a pandemic flu, the researchers said.

Most of the flu and the highest attack rates were seen among children, reinforcing earlier findings that the H1N1 swine flu tends to target children and younger adults.

Morgan said the study was done at the start of the epidemic in the United States to learn more about the H1N1 virus, about which relatively little was known at the time. "This gave us an idea of how fast the flu might spread," he said. "It also gave us an idea of who might be at greatest risk of infection."

Flu expert Dr. Marc Siegel, an associate professor of medicine at New York University Langone Medical Center in New York City, said "this study adds to other studies that suggest that the transmission rate of H1N1 strain may have been lower than anticipated."

However, Siegel, noting that this study was done at the start of the pandemic, said the findings may not hold up once later data are available.

"There is clearly a variation based on where in the wave [the outbreak] you are," he said. "It may have kicked up over the summer and become more transmissible. So I'm not buying that H1N1 is less transmissible than seasonal flu. I think it depends on when you happen to catch it."

Siegel added that, for a pandemic flu virus, H1N1 is mild. "It is behaving like a pandemic in terms of its translatability, but not in terms of its lethality," he said.

More information

For more on H1N1 flu, visit the U.S. Department of Health and Human Services.



SOURCES: Oliver Morgan, Ph.D., Epidemic Intelligence Service officer, Division of Emerging Infections and Surveillance Services, U.S. Centers for Disease Control and Prevention; Marc Siegel, M.D., associate professor, medicine, New York University Langone Medical Center, New York City; April 2010, Emerging Infectious Diseases


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

Related medicine news :

1. Family's Fight to Save Child Spreads Hope Around Globe
2. Scientists May Know How Lung Cancer Spreads
3. Ruben Studdard, American Idol Winner and R&B Pop Star, Spreads the Word about Sickle Cell Disease and the Dangers of Iron Overload
4. Drug May Extend Life When Breast Cancer Spreads
5. Swine Flu Spreads
6. Happiness Spreads Through African Villages Thanks to Growing Contributions from Long Term Care Insurance Professionals
7. Scientists at Yale provide explanation for how cancer spreads
8. Combo Treatment Ups Survival When Cancer Spreads to Abdominal Lining
9. AIRLIFE Denver Spreads its Wings with Third Helicopter
10. Survival shortened when ER/PR negative breast cancer spreads to the brain
11. One shot of gene therapy spreads through brain in animal study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... CITY, Fla. (PRWEB) , ... October 12, 2017 , ... ... cold therapy products, announced today the introduction of an innovative new design of the ... multipurpose pad so you get maximum comfort while controlling your pain while using cold ...
(Date:10/12/2017)... ... October 12, 2017 , ... Information about the ... to develop to enable prevention of a major side effect of chemotherapy in ... in pediatric patients. For cisplatin, hearing loss is FDA listed on-label as a ...
(Date:10/12/2017)... ... October 12, 2017 , ... Leading pediatric oncology experts at ... for the 49th Congress of the International Society of Paediatric Oncology (SIOP) ... Center for Cancer and Blood Disorders at Children’s National, and Stephen P. ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... nation's first interactive health literacy software tool, and the Cancer Patient Education Network ... cancer patient education, today announce a new strategic alliance. , As CPEN’s ...
(Date:10/12/2017)... ... 2017 , ... Farm Forward joins Bon Appétit ... institutions in announcing the launch of the Leadership Circle , a program ... raised for food. , Founding members of the Leadership Circle also include Airbnb’s ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... Oct. 11, 2017  Caris Life Sciences ® , ... the promise of precision medicine, today announced that St. ... Precision Oncology Alliance™ (POA) as its 17 th ... St. Jude Crosson Cancer Institute will help develop standards ... of tumor profiling, making cancer treatment more precise and ...
(Date:10/7/2017)...   Provista, a proven leader in the ... purchasing power, today announced a new resource area on ... is the online home for case studies, articles ... news releases, slideshows and events. ... resources at their fingertips, viewers can also watch short ...
(Date:10/2/2017)... Oct. 2, 2017 Diplomat Pharmacy, Inc. (NYSE: ... Software and Consulting, LLC , and named its founder ... based in Tennessee , will operate ... expands EnvoyHealth,s service offerings for health care partners to ... "In an interoperable world, technology ...
Breaking Medicine Technology: