Alloferon 2 is one of the antibacterial peptide. It was originally a 12-amino acid peptide fragment extracted from Blowfly. It was found in some biological in vitro experiments that the peptide fragment can activate NK cells; in vivo experiments show that the peptide Fragment treatment of mice will induce the synthesis of interferon, which has anti-influenza virus and anti-tumor functions. Alloferon 2 is currently mainly used in veterinary medicine research.