CD40LG and leprosy: An enhanced chemoprophylaxis regimen was given to children with high antibody titres (anti-PGL IgM) for leprosy: rifampicin 300 mg/day and clarithromycin 250 mg/day for the first ten days, followed by three months of intermittent two-weekly doses of rifampicin 300 mg and clarithromycin 250 mg.