CD40LG and infection: We collected 86 blood samples up to 7 months after infection, and analysed the antibody responses against MPXV with a serological assay using a panel of eight viral antigens.RESULTSMonitoring of antibody kinetics revealed transient IgM responses in the first weeks following infection and a robust polyclonal IgG response that peaked 1-2 months after infection but declined consistently in the following months.