NC-5	4-[2,2-bis(hydroxymethyl)-5-oxopyrrolidin-l-yl]-3-(5-cyclohexyl-4H-1, 2,4-triazol-3-yl) amino) benzoic acid
NA	neuraminidase
H1N1	influenza A virus A/FM/1/47 (H1N1)
H1N1-H275Y	influenza A virus A/FM/1/47-H275Y (H1N1-H275Y)
H3N2	influenza A virus A/Beijing/32/92 (H3N2)
H5N1	influenza A virus A/Vietnam/1203/2004 (H5N1)
H7N9	influenza A virus A/Anhui/1/2013 (H7N9)
H7N9-R294K	influenza A virus A/Anhui/1/2013-R294K (H7N9-R294K
MDCK	Madin–Darby canine kidney cells
DMEM	Dulbecco’s modified Eagle’s medium
CHO-K1	Chinese hamster ovary
OS	oseltamivir phosphate
OC	oseltamivir carboxylate
RBV	ribavirin
CPE	cytopathic effect
EC50	50% effective concentrations
CC50	50% cytotoxic concentration
TCID50	50% tissue culture infectious dose
H & E stain	haematoxylin and eosin stain