H1N1 swine flu can kill children at a much higher rate than seasonal flu, and the elevated risk for pregnant women extends as long as two weeks after they give birth, researchers reported on Wednesday.
The findings show that the H1N1 pandemic, while overall no more deadly than seasonal flu, is capable of hitting vulnerable women and children far harder than regular flu usually does.
“Pediatric 2009 H1N1 influenza was associated with pediatric death rates that were 10 times the rates for seasonal influenza than in previous years,” Dr. Romina Libster of Hospital Posadas in Buenos Aires and colleagues wrote in the New England Journal of Medicine.
They said hospitalization rates for children with H1N1 were twice those of the 2008 rate for seasonal influenza.
H1N1 flu has killed more than 10,000 people in the United States alone, infected nearly 50 million and put 200,000 into the hospital. Pregnant women and children were known to be at higher risk and had already been given priority for the vaccine.
The results show that prompt treatment is important, Dr. Fernando Pollack of Vanderbilt University in Tennessee said in a telephone interview. Roche AG’s Tamiflu and GlaxoSmithKline’s Relenza can help ease symptoms if given quickly.
“We cannot chase this disease from behind. Once it gets going, it is very difficult to treat. All our fatal cases had not been treated within 48 hours of the development of symptoms,” he said.
“Patients with lung problems or neurologic problems are at serious risk of not only having serious disease, but dying of swine flu,” Pollack added. “They should not only be targets for vaccination, but for treatment.”