Seven people have tested positive for the H5N8 virus at a poultry farm in southern Russia.
The pathogen has not been previously reported among humans.
Outbreaks have been reported across the world but are usually found in infected or sick birds.
If infected, the World Health Organisation stated the flu can cause death or severe illness among humans.
Scientists at the Vector Scientific Center detected bird flu in December before reporting the human cases to the WHO today.
More to follow…