Five major infusion centers in Texas have run out of the only antibody treatment that is proven to be effective against the COVID-19 Omicron variant.

The Texas Department of State Health Services (DSHS) said that its five largest regional infusion centers "have exhausted their supply of sotrovimab" until they are able to obtain more in January. Sotrovimab is the only monoclonal antibody treatment that has been shown to be effective against Omicron. However, the infusion centers will continue to distribute antibodies in cases that are attributed to the Delta variant.

"Other monoclonal antibodies have not shown to be effective against the Omicron variant, which now accounts for more than 90 percent of new cases," the DSHS said in a statement. "The infusion centers will continue to offer those antibodies as prescribed by health care providers for people diagnosed with a non-Omicron case of COVID-19."

In the meantime, the DSHS urged people to get vaccinated or boosted amid the shortage. They also said that Paxlovid, Pfizer-BioNTech's oral antiviral COVID pill, will also be available soon, although a specific date has not been given.

"Everyone should protect themselves from severe COVID-19 by getting vaccinated as soon as possible, getting a booster as soon as they are eligible, and continuing to take precautions to prevent being exposed to the virus that causes COVID-19 and spreading it to others," the DSHS urged in the statement.

The antibody shortage is drawing statewide ire, from citizens to politicians. However, it is perhaps drawing the most anger from Texas Governor Greg Abbott, who released a statement on Twitter placing the blame on the administration of President Joe Biden for not fairly distributing these treatments.

"Biden vows full federal support to help states combat COVID. But he's not," Abbott tweeted on Monday. "Biden is hoarding the anti-body therapeutic drugs & denying states independent access to that medical treatment. Now, he has stopped providing any of that medicine to Texas."

The Biden administration has not commented on Abbott's statement. Around 300,000 doses are expected to arrive in the U.S. next month.

Texas Blood Test
Five major infusion centers in Texas have run out of the only antibody treatment that is proven to be effective against the COVID-19 Omicron variant. Above, lab manager Robyn Schuman holds blood samples to be tested for COVID-19 at the Bellville Medical Center, in Bellville, Texas, on September 1, 2021.Photo by Francois Picard/AFP via Getty Images

Supply of the drug is "extremely limited, and additional doses of the product will not be available until the week of January 3rd," the U.S. Department of Health and Human Services said in a statement posted online.

The Associated Press contributed to this report.