Ineffectiveness of Isolation of Patients as a Method of Preventing the Spread of Mumps

Abstract
During an outbreak of mumps all susceptible children on an open ward were infected despite the fact that cases were isolated at the first sign of parotid swelling. The ineffectiveness of isolation could probably be attributed to the finding that virus was recovered from the pharynx of children before the onset of parotid swelling. Moreover, only nine of 13 mumps infections were manifested by parotitis.