Report: New bird flu deadlier than swine flu - KYTX CBS 19 Tyler Longview News Weather Sports

Report: New bird flu deadlier than swine flu

Posted: Updated:

(CNN) - The H7N9 bird flu virus, first identified in humans earlier this year, kills about 36% of infected people admitted to hospitals in China, according to a new report published Sunday in the British medical journal The Lancet.

Far more difficult to estimate, according to the study, is how many die in the general population after becoming infected, as the most severe cases are also more likely to lead to hospitalization.

That estimate – a 0.16% to 2.8% overall fatality rate for those showing symptoms of infection – suggests that the H7N9 virus is less deadly than the H5N1 Bird Flu first appearing in 2003, and more deadly than the 2009 H1N1 swine flu pandemic.

Others infected with the virus may never show symptoms.

"There's almost always a large portion of asymptomatic (flu virus) cases, and cases where infected people don't seek treatment," says Dr. Gabriel Leung, one of the study's authors and head of the University of Hong Kong's School of Public Health.

The rate of infections seen earlier this year has nearly stopped entirely at 132 total confirmed cases, almost all in China and one in Taiwan, according to the World Health Organization and the study. Thirty-seven people have died. Only one case has appeared since May 8 - a 6-year-old boy in Beijing.

Still, public health officials warn that number could significantly rise again during the autumn flu season.

In contrast to H1N1 swine flu, which is now part of the seasonal flu vaccine, H7N9 and H5N1 flu viruses most commonly occur after exposure to infected poultry, and do not appear to spread easily from person-to-person.

In April, the World Health Organization warned the H7N9 virus was "one of the most lethal" that doctors and medical investigators had faced in recent years.

"The preemptive closure of live poultry markets made a difference," says Leung. "They were closed within weeks of the initial cluster of cases in and around the Yangtze delta. If those live poultry markets are reopened, we may expect to see cases again."

Symptoms of H7N9 flu infection start with high fever and cough, and in severe cases progress to pneumonia and multi-organ failure, according to the Centers for Disease Control and Prevention.

The risk to people in the United States is low, and no cases have been detected in the country, the CDC says.

New bird flu strain: 5 things to know 

  • Local NewsMore>>

  • Jacksonville Communications Officer Killed in One Vehicle Crash

    Jacksonville Communications Officer Killed in One Vehicle Crash

    Monday, April 14 2014 11:31 PM EDT2014-04-15 03:31:53 GMT
    SMITH COUNTY (KYTX) -- DPS says a woman is dead after a crash Monday afternoon.  It happened just before 2:00 p.m. at the intersection of Mixon Road and Yarborough Lane in Smith County.  At this pointMore >>
    A Jacksonville Police communications officer has died after a crash Monday afternoon.
    More >>
  • Family remembers Fort Hood shooting victim with Illinois ties

    Family remembers Fort Hood shooting victim with Illinois ties

    Thursday, April 3 2014 10:35 PM EDT2014-04-04 02:35:25 GMT
    EFFINGHAM (WCIA)  -- One of the victims in a deadly shooting in Fort Hood went to school in central Illinois. Family members say 37-year-old Army Sergeant Tim Owens went to Southside Elementary in Effingham.  Owens'More >>
    One of the victims in a deadly shooting in Fort Hood went to school in central Illinois. Family members say 37-year-old Army Sergeant Tim Owens went to Southside Elementary in Effingham.More >>
  • Hallsville Student Finds Used Needle on School's Playground

    Hallsville Student Finds Used Needle on School's Playground

    Saturday, April 19 2014 7:43 PM EDT2014-04-19 23:43:25 GMT
    HALLSVILLE (KYTX) - A situation to make any parent worry. Pamela Kelly says her 4 year old son came home from school recently with a hole in his hand. Tyler Kelly goes to Pre-K here, at the Little Cats Learning Center in Hallsville. Kelly says since coming forward with this news,she has received thanks from other parents."They have been extremely thankful. So they can be more proactivand morere on the look out." - Pamela Kelly, Tyler'Mom Thehe school made this statement to CBS 19 via email. T...More >>
    HALLSVILLE (KYTX) - A situation to make any parent worry. Pamela Kelly says her 4 year old son came home from school recently with a hole in his hand. Tyler Kelly goes to Pre-K here, at the Little Cats Learning Center in Hallsville. Kelly says since coming forward with this news,she has received thanks from other parents."They have been extremely thankful. So they can be more proactivand morere on the look out." - Pamela Kelly, Tyler'Mom Thehe school made this statement to CBS 19 via email. T...More >>
Powered by WorldNow

CBS19, MYTX & KCEB
2211 ESE Loop 323
Tyler, TX 75701
Phone (903) 581-2211
Fax (903) 581-5769

Powered by WorldNow
All content © Copyright 2004 - 2014, WorldNow and KYTX, Owned and Operated by London Broadcasting Company.
All Rights Reserved. For more information on this site, please read our Privacy Policy and Terms of Service.