The Hawaii Department of Health increased its case count for an ongoing mumps outbreak to 770 on Jan. 4.
The new count marks a 270-case increase since Oct. 19. State health officials have been investigating the outbreak since March of last year.
The majority of infections (610) have occurred in Honolulu residents. Officials have also identified 108 cases on the island of Hawaii, 49 cases on Kauai and three cases on Maui. The state experienced a total of 10 mumps cases in 2016.
The mumps is a virus spread through person-to-person contact. The illness causes swelling of the salivary glands, fever, headache, muscle aches, tiredness and loss of appetite.
To learn more about the mumps, click here.
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