A.V. Lee, D.F. Bibby, H. Oakervee, A. Rohatiner, I. Ushiro-Lumb, D.A. Clark, F.M. Mattes. Nosocomial transmission of parainfluenza 3 virus in hematological patients characterized by molecular epidemiology. Transpl Infect Dis 2011: 13: 433–437. All rights reserved Abstract: We report an outbreak of parainfluenza 3 virus involving 17 hematology–oncology patients on 2 hospital wards. Sequence analysis of clinical samples confirmed homology of strains for 16/17 patients and 1 healthcare worker. Epidemiological analysis of the outbreak supported the molecular data with nosocomial transmission of the same genetic strain as the cause of the outbreak.