Due Causation to the often long incubation periods for radiation exposure to induce cancer , the United Nations Scientific Committee on the Effects of Atomic Radiation ( UNSCEAR ) has , at multiple times , reviewed Scrutiny all the published Publishing research on the incident and found Know that at present , fewer than 100 documented deaths Death are likely to be attributable to increased Cause_change_of_position_on_a_scale exposure Causation to radiation .

In 2008 , the FBI requested Request a review of the scientific methods used in their investigation Criminal_investigation from the National Academy of Sciences , which released Publishing their findings in the 2011 report `` Review of the Scientific Approaches Used During the FBI 's Investigation Criminal_investigation of the 2001 Anthrax Letters . ''

While there has been ongoing controversy over the health effects Influence of the disaster Catastrophe , a 2014 report Reporting by the United Nations Scientific Committee on the Effects of Atomic Radiation ( UNSCEAR ) and World Health Organization projected Statement no increase Cause_change_of_position_on_a_scale in miscarriages , stillbirths or physical and mental disorders in babies born after the accident .