The joint Human Animal Infections and Risk Surveillance (HAIRS) group is a multi-agency and cross-disciplinary horizon scanning group, chaired by the HPA's Department of Gastrointestinal, Emerging and Zoonotic Infections at HPA Colindale. The group meets to identify and discuss infections with potential for interspecies transfer (particularly zoonotic infections). The work of the HAIRS group is described in a series of reports.