SAN ANTONIO (CBSDFW.COM) — The CDC announced Sunday that a previously quarantined patient in San Antonio has since tested positive for the coronavirus.

In a statement released Mar. 1, San Antonio Mayor Ron Nirenberg said that patient has returned to the Texas Center for Infectious Disease for additional testing and monitoring in order to verify the latest reading.

READ MORE: Fight Between Brothers Ends With 1 Shot, Critically Injured And 1 Arrested In Alvarado Friday Night

Nirenberg added that “the fact that the CDC allowed the public to be exposed to a patient with a positive COVID-19 reading is unacceptable.”

The CDC said in a release that the patient had negative results for two tests and was released from a local healthcare facility Saturday. But later returned after a pending, subsequent lab test that came up positive for the virus that causes COVID-19.

READ MORE: 'I'm Afraid We're Going To See A Surge Of Violence' Says Texas Criminologist Following Recent Mass Shootings

This patient had been under isolation while being treated at a local medical facility for several weeks following a return to the U.S. from Wuhan, China, on a State Department chartered flight.

“At the time of discharge from the facility, the patient was asymptomatic and met all of CDC’s criteria for release — resolution of any symptoms and two consecutive sets of negative test results, collected more than 24 hours apart. Following the patient’s release, results of a subsequent sample were received, and determined to be weakly positive.Out of an abundance of caution, CDC decided to bring the individual back into isolation at a local medical facility.”

The discharged patient did have contact with others while out of isolation, however the CDC along with local public health partners are following up to “trace possible exposures and notify them of their potential risk.”

MORE NEWS: Texas Grand Jury To Consider Charges In Shooting Death Of Protester Garrett Foster Last Summer

For more information about COVID-19 click here.