ACE2	angiotensin-converting enzyme 2
COVID-19	coronavirus disease 2019
ELISA	enzyme-linked immunoassay
FP	Fusion Protein
GRCEM	Gamaleya National Research Centre for Epidemiology and Microbiology
HRs	Heptad Repeats
ICTV	International Committee on Taxonomy of Viruses
NTD	N-terminal Domain
RBD	Receptor Binding Domain
SARS-CoV-2	severe acute respiratory syndrome coronavirus 2