Health officials say norovirus caused scores of people to become ill after they attended a dance competition held in Rochester last month.
The Democrat and Chronicle of Rochester reports the Monroe County Department of Health says laboratory tests confirmed that a highly contagious norovirus sickened dancers and family members attending the three-day event held at the Rochester Riverside Convention Center.
Health department officials tracked down 300 of the approximately 700 people who were at the venue from Jan. 8 to 10. The agency says about 100 reported they had become ill.
Officials say the outbreak wasn't caused by anything at the convention center. Many of the people who became sick didn't eat at the venue, leading health officials to conclude that the illness spread from person to person.