According to University of Iowa scientists, a duck hunter and two state wildlife officials have tested positive for a nonlethal form of avian flu, marking the first cases to suggest that bird flu can be transmitted from wild birds to humans. The people in this case were three subjects among 39 duck hunters and 68 state wildlife experts whose blood was tested as part of ongoing research. "This study demonstrates that the handling of wild waterfowl, such as ducks and geese, is a risk factor to human health," study leader author James Gill told National Geographic News. "Humans [should] wear gloves when handling wild animals and then wash or thoroughly clean their hands afterwards. They should also avoid smoking or eating while handling wild animals," he continued. Another expert, however, sees problems with the study, noting the lack of a control group and the likelihood of false positives.