Brain cells have the angiotensin-converting enzyme 2 (ACE2) receptors, transmembrane serine protease 2 (TMPRSS2), cathepsin L, and furin, all of which have been identified as important for the process of infection with SARS-CoV-2 (see Zhang and colleagues 2020, supplemental material). The gene discussed is TMPRSS2; the disease is infection.