4Seng C,Watking P,Morse P,et al.Parvovirus B19 outbreak on an adultward.Epidemiology of Infection,1994,113(2):345.
5Singh-Naz N,Brown M,Ganeshanan than M.Nosocomial adenovirus infectio n:molecular epidemiology of an outbreak.Pediatric Infection Disease Journal,1993,12(11):922.
6Stevenson P,McCann R,Duthie R,et al.A hospital outbreak due to Norwalkvirus.Journal of Hospital Infection,1994,26(4):261.