ACE2 and infection: Although deer species that tested negative in these studies, which belong to genera Pudu (Pudu Puda), Capreolus (Capreolus capreolus), Cervus (Cervus elaphus, C. nippon), Dama (Dama dama), and Hydropotes (Hydropotes inermis), are genetically distinct from the Odocoileus spp., which seem to be more susceptible to infection, similarity of ACE2 amino acid sequences among various deer groups suggest the susceptibility to SARS-CoV-2 infection may not be varied [39].