Bird flu has made its way stateside.

A duck shot in Washington state tested positive for H5N1 avian influenza, a similar strain to that which has stormed across Asia and killed some 400 people, more than half the number infected by the virulent strain, according to NBC News.

The green-winged teal shot in Whatcom County was confirmed in a report to be contaminated with a relative of the highly pathogenic avian influenza, according to a report issued by the United States Department of Agriculture.

It does not appear to have spread to domestic poultry or humans, NBC reported.

"USDA and the Department of the Interior are going to have to spend time to understand the implication of this introduction," Hon Ip, an expert on wildlife pathogens with the U.S. Geological Survey,told NBC News. "At the moment, we do not know of a single human case with our H5.".

H5N1 is the strain most feared by scientists for its ability to infect humans and which has already forced the killings of millions of domestic poultry infected around the world.

"The new H5N1 virus is a different virus than the one circulating in Asia, and this particular strain has never been identified in an animal or human host before," USDA spokeswoman Lyndsay Cole told the Daily News. "There is no reason to believe this new strain is a human health risk. The new mixed-origin virus combines the H5 genes from the Asian H5N1 virus with N genes from low pathogenic avian influenza viruses found in wild birds from North America."

A traveler who fell ill on a flight from Beijing to Canada Dec. 27 died of the lethal relative of H5N1 earlier this month, the first fatal case of bird flu in North America.

"Whenever avian influenza viruses are circulating in poultry, sporadic infections or small clusters of human cases are possible in people exposed to infected poultry or contaminated environments, especially in households," the World Health Organization says, according to NBC. "Human infections remain rare and these influenza A (H5N1) viruses do not currently appear to transmit easily among people. As such, the risk of community-level spread of these viruses remains low."