 In September 2009 , the CDC reported that the H1N1 flu " seems to be taking a heavier toll among chronically ill children than the seasonal flu usually does . " Through 8 August 2009 , the CDC had received 36 reports of paediatric deaths with associated influenza symptoms and laboratory @-@ confirmed pandemic H1N1 from state and local health authorities within the United States , with 22 of these children having neurodevelopmental conditions such as cerebral palsy , muscular dystrophy , or developmental delays . " Children with nerve and muscle problems may be at especially high risk for complications because they cannot cough hard enough to clear their airways " . From 26 April 2009 , to 13 February 2010 , the CDC had received reports of the deaths of 277 children with laboratory @-@ confirmed 2009 influenza A ( H1N1 ) within the United States . 
