Luis Hernandez-Pelegrin is part of the Insect Doctors program, a European Joint Doctoral Programme (EJD) funded to train young scientists to understand and manage diseases affecting commercial insect production systems. Specifically, his thesis aims to unravel the role of the covert infections caused by RNA viruses in the agricultural pest Ceratitis capitata, while keeping an eye open on the potential applications of this knowledge on mass-rearing and biocontrol.