Lab24 in Miami is listed as reporting 457 results — all positive. In fact, the lab says, it has tested about 10,000 people in Florida. Mike Ross, a spokesman for Lab24, had said the state requires private labs to notify health officials only of positive results, which is all the lab sent. Now, the lab is going back, county by county, to report their full results. Including the negatives, Ross said, Lab24 is seeing an 18.5% positivity rate.