Avian flu: Gain-of-function experiments on H7N9.

The article discusses the research conducted by the researchers of NIAID Centers of Excellence in Influence Research and Surveillance regarding the threat posed by the A(H7N9) viruses. It states that the virus has several motifs which are mammalian in characteristics. It also mentions that the haemagglutinin proteins of the virus have cleave site which is consistent with low-pathogenic phenotype in birds.