Our aim in establishingnebulization protocols for proteins was to use it as a treatment option.Hamster has been shown as a preferable model for SARS-CoV-2 bindingto ACE2, as the binding affinity is similar to that observed to humanACE2, while binding to mice ACE2 is poor.13 RBD-62 was specifically engineered to block ACE2 and thereby inhibitSARS-CoV-2 infection. Here, ACE2 is linked to COVID-19.