The Centers for Disease Control and Prevention failed to act for at least a year on warnings that trailers housing refugees from Hurricanes Katrina and Rita contained dangerous levels of formaldehyde, according to a House subcommittee report released [on October 6]. Instead, the CDC's Agency for Toxic Substances and Disease Registry demoted the scientist who questioned its initial assessment that the trailers were safe as long as residents opened a window or another vent, the report said. That appraisal was produced in February 2007 at the request of the Federal Emergency Management Agency, which had received thousands of complaints about fumes since providing the trailers to families left homeless by the devastating 2005 hurricanes. Formaldehyde is known to cause cancer, chronic bronchitis, eye irritation and other ailments. It was used in glue for rugs, plywood, fiberboard and other materials. The subcommittee's report came three days after a federal judge in New Orleans ruled that FEMA can be sued by hurricane victims who claim they were exposed to toxic fumes. The subcommittee report noted that the agency took eight months to revise its initial finding and did so only after Christopher De Rosa, then director of the CDC agency's Division of Toxicology and Environmental Medicine, publicly flagged scientific errors. We believe that Dr. De Rosa is a whistle-blower and was removed from his position, which he had held for 16 years, in retaliation for his persistent attempts to push the agency's leadership to take more substantive actions to protect the public's health," the report said.