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SAN DIEGO — The number of “presumptive positive” coronavirus cases in San Diego County rose to eight on Friday, according to county health officials.

Five new presumptive positive cases were reported by county health officials on Thursday in addition to the first case reported in the county on Monday.

The three additional cases reported Friday include a man in his 40s who is hospitalized and in isolation and traveled to New York and Philadelphia, a man in his 30s who is in isolation at home and traveled to Chicago, and a woman in her 70s who is at home in isolation.

The eight patients undergoing treatment for coronavirus in San Diego County are in addition to three patients who were placed in federal quarantine at MCAS Miramar. Two of those patients have confirmed coronavirus cases, and one is a presumptive positive case.