Source: https://www.thelancet.com/journals/l...607-8/fulltext

Mumps in a highly vaccinated Marshallese community in Arkansas, USA: an outbreak report
Published:January 08, 2019DOI:https://doi.org/10.1016/S1473-3099(18)30607-8

Summary
Background
During 200015, Arkansas Department of Health, Little Rock, AR, USA, investigated between one and six cases of mumps each year. From Aug 5, 2016, to Aug 5, 2017, the department received notification of more than 4000 suspected mumps cases in the second largest outbreak in the USA in the past 30 years.

Methods
Arkansas Department of Health investigated all reported cases of mumps to ascertain exposure, travel, and vaccination histories and identify close contacts. Cases were classified as confirmed if the patient had laboratory confirmation of mumps virus or probable if they had clinical symptoms and either a positive serological test or a known epidemiological link to a confirmed case...