The World Organization for Animal Health (OIE) has received multiple reports from countries in Asia and Europe regarding a recent spread of bird flu, giving rise to concerns that the virus may be spreading again. Bird flu, or avian influenza, is a viral disease that affects both domestic and wild birds. The virus has also been isolated from mammals including dogs, cats, mice, horses and humans. Certain strains are more prevalent in specific regions of the world. Multi-region bird flu outbreaks usually result in mass culling and trade restrictions. The disease can be transmitted to humans and epidemiologists have started taking note of an H5N6 variant that has so far been reported in 21 people in China. Though hundreds of people on the mainland were infected with the H7N9 variant in 2019, the latest subtype is causing concern as many of these people are critically ill and at least six …