Ouray County’s mass COVID-19 testing event yielded three confirmed positive cases out of 618 tests. The two-day testing event last week was held in response to an outbreak traced to a private social event last month.

A woman in her 50s, a man in his 60s and a man in his 20s received positive test results. The man in his 20s was previously a “probable” case that was being monitored.

At this point, local health officials believe they have contained the outbreak, but are also bracing for a poss...