ACE2 and infection: Thus, we transduced A549 cells stably expressing human angiotensin converting enzyme-2 (ACE-2), the receptor for the SARS-CoV-2 viral entry41, with either rNEIL2, rNEIL1, or mock (PBS+carrier) and cells were then infected with SARS-CoV-2 (WA1-2020 isolate) at the multiplicity of infection (MOI) of 1 for 24 h.