The Wuhan Institute of Virology is authorized to receive taxpayer funding for animal research until January 2024, the National Institute of Health told the Daily Caller News Foundation.

The WIV is at the center of widespread speculation that COVID-19 could have entered the human population in China due to an accidental lab leak. Researchers at the lab were studying bat-based coronaviruses prior to the outbreak, a project partially backed by $600,000 in U.S. taxpayer funds routed to the lab through the nonprofit group EcoHealth Alliance.

EcoHealth Alliance’s work researching bat-based coronaviruses in China was funded by a $3.7 million grant from the National Institute of Allergy and Infectious Diseases in 2014, according to The Wall Street Journal.

The grant was terminated by the National Institutes of Health in April amid criticism over EcoHealth Alliance’s relationship with the WIV. The NIH said in a letter the nonprofit’s work in China did not align with “program goals and agency priorities.”