In a 2000 review by the Centers for Disease Control and Prevention, which examines data from both media reports and from the Humane Society of the United States, pit bull-type dogs were identified in approximately one-third of dog bite-related fatalities in the United States between 1981 and 1992. Pittbull to all my hatters face mask However, the review notes that studies on dog bite-related fatalities which collect information by surveying news reports are subject to potential errors, as some fatal attacks may not have been reported, a study might not find all relevant news reports, and the dog breed might be misidentified. The AVMA has also noted fundamental problems with tracking breed in dog bite-related fatalities. In a 2013 study of 256 fatalities in the United States from 2000 to 2009, the AVMA determined that valid breed determination was possible for only 17.6% of cases.
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