This is how coronavirus testing works at Louisiana’s state-run lab 

The Louisiana lab is able to test 200 to 250 samples per day and can turn around results in about three days. So far, about 40 percent of the samples tested at the facility have come back positive for COVID-19, according to the Office of Public Health. That’s much higher than the overall positive rate for tests in the state, which stood at 16% as of Tuesday.

Source: This is how coronavirus testing works at Louisiana’s state-run lab | Coronavirus | nola.com