Working Group looked at more than 100 studies done since 2001 . Survivors reported higher levels of pain and respiratory problems such as pneumonia . `` Honestly , it was so surreal , '' Freed said . More federal funds needed for medical services for at - risk groups , it says . Watch 9/11 coverage in New York and Washington on CNN.com " .
Working Group looked at more than 100 studies done since 2001 . Survivors reported higher levels of pain and respiratory problems such as pneumonia . More federal funds needed for medical services for at - risk groups , it says . Watch 9/11 coverage in New York and Washington on CNN.com " .