The deadly ‘G4’ virus is extremely dangerous. Currently they are similar to the H1N1 virus that causes bird flu. Researchers call this virus sequence called G4, which is a genetic variant. Full Name G4 EA H1N1. This sequence is associated with three previously identified virus strains. New strains of the European and Asian birds (EA), the H1N1 flu strain, and the North American flu strains carrying genes from birds, pigs and humans, have now been discovered..."The virus is considered to be capable of spreading to humans, according to AFP.