Updated: July 19, 2016 7:01 PM ET | Originally published: July 19, 2016 5:52 PM EDT

Correction appended, July 19

Nearly a dozen delegation staffers from California who are in Ohio for the Republican National Convention have become sick with the norovirus.

The 11 members of the California Republican Party who have come down with the highly contagious digestive illness are staying at the Kalahari Resort in Sandusky, Ohio, which is about 60 miles from where the GOP convention is being held in Cleveland, USA Today reports.

The staffers brought the illness from their home state and have been isolating themselves from the public at their hotel, Erie County Health Commissioner Peter Schade told the newspaper.

Norovirus, which inflames the stomach and intestines, can be contracted through an infected person, contaminated food or water or tainted surfaces, according to the Centers for Disease Control and Prevention. Symptoms include stomach pain, nausea, and diarrhea and vomiting.

Correction: A previous version of this article misstated the role of those who became sick.

[USA Today]

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