A man who has traveled to Asia to catch the flu has returned to the United States, according to the Centers for Disease Control and Prevention.
The man is described as white, in his 30s, and 5 feet 9 inches tall.
He was last seen wearing a black baseball cap and a white T-shirt.
No other details were available.
More than 1.1 million people have reported being sickened by the flu in the United State so far this year.