translate English to French: There were no secondary cases in the school where she had been in contact with other students during the infectious period (just prior to her rash) or among 40 of her companions with whom she had travelled during the school trip.
Il n'y a pas eu de cas secondaires parmi les élèves de l'école avec lesquels elle avait eu des contacts alors qu'elle était contagieuse (soit juste avant l'éruption) ni parmi ses 40 compagnons de voyage.