More than half of the COVID-19 test samples sent to a laboratory from Tuscaloosa County at the DCH Regional Medical Center test site were deemed not sufficient or spoiled, according to Mayor Walt Maddox.

Maddox tweeted Friday evening that according to the Alabama Department of Public Health, in the last four days, among the 1,043 samples sent to the test lab, 528 of them were not sufficient. He said 40 have been processed, with one positive. There are 475 samples still in process, Maddox said.

“Although everyone is pouring their hearts and souls into this, it’s disappointing,” Maddox said in a follow-up tweet. “We must all learn quickly and we must all do better for [Tuscaloosa] and our state.”

Coronavirus cases have been reported in 15 of Alabama’s 67 counties. Among the 106 confirmed positive cases in Alabama, there are currently four confirmed in Tuscaloosa County.

This Center for Disease Control website page lays out the stringent guidelines on the testing.

According to ADPH, in the last 4 days, 1043 samples sent to the testing laboratory from #Tuscaloosa County at the @dchsystem site. There have been 40 processed with 1 positive. 528 of the 1043 samples were not sufficient or spoiled. There are 475 samples still in process. — Walt Maddox (@WaltMaddox) March 20, 2020