The Hawaii State Department of Health on Thursday increased its count of mumps cases for the year to 257, marking an 85-case increase since July 20.
The new case count includes the first reported case on the island of Maui. The bulk of cases (229) occurred on Oahu, with 22 cases reported on Kauai and five cases on Hawaii. Health officials have confirmed mumps infections in both unvaccinated and vaccinated adults and children.
Mumps can cause painful, swollen salivary glands. It is a highly transmissible virus contracted via person-to-person contact. Two doses of the measles-mumps-rubella vaccine are 88 percent effective at preventing mumps, according to the CDC.
In 2016, Hawaii reported just 10 mumps cases, according to Hawaii News Now.
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