This assay was designed and developed by Alyssa Pyke and Bruce Harrower at this laboratory aided by design software in use at the time. The assay specifically targets the haemagglutinin (HA) region of influenza A(H1)pdm09 virus strains and is designed as a qualitative screening test for human cases of infection, but not for infection due to other known influenza viruses. The assay aims to detect any circulating seasonal H1N1 influenza strains, not only influenza A(H1)pdm09 virus.