Moderate in susceptible population . Low in vaccinated school population. Could argue that exclusion is not needed because disease is usually mild and most school contacts should be immune. Henle G, Henle W, Wendell KK, Rosenberg P. Isolation of mumps virus from human beings with induced apparent or inapparent infections.
Mumps outbreak in a highly vaccinated school population.
Ennis FA, Jackson D. Isolation of virus during the incubation period of mumps infection. Brunell PA, Brickman A, O Hare D, Steinberg S. Ineffectiveness of isolation of patients as a method of preventing the spread of mumps.