In a rare case of bird flu, a person in Missouri was hospitalized with no known exposure to sick or infected animals, making it the first of such a case in the current outbreak, raising concerns about the human-to-human transmission of the virus, as per reports. The health officials weren't able to determine the source of the infection, however, the person has recovered.
Avian influenza has been spreading in the United States for some time now and the abovementioned case is the 14th case of bird flu, but the first that was contracted without known animal exposure. This has raised concerns about the existence of a new strain, however, it may be possible that the animal exposure could be without the knowledge of the person