A newly discovered bat coronavirus uses the same cell-surface protein to gain entry into human cells as the SARS-CoV-2 virus that causes COVID-19, raising the possibility that it could someday spread to humans, Chinese researchers have reported. The virus does not enter human cells as readily as SARS-CoV-2 does, the Chinese researchers reported in the journal Cell, opens new tab, noting some of its limitations. The scientists said that like SARS-CoV-2, the bat virus HKU5-CoV-2 contains a feature known as the furin cleavage site that helps it to enter cells via the ACE2 receptor protein on cell surfaces. In lab experiments, HKU5-CoV-2 infected human cells with high ACE2 levels in test tubes and in models of human intestines and airways. In further experiments, the researchers identified monoclonal antibodies and antiviral drugs that target the bat virus.