BALF	bronchio-alveolar lavage fluid
cHA	chimeric hemagglutinin
CPE	cytophathic effect
DPC	days post challenge
Emul	Emulsigen adjuvant
H&E staining	hematoxylin and eosin staining
HA	hemagglutinin
HI	hemagglutination inhibition
ICS	intracellular cytokine staining
IFN	interferon
Ig	immunoglobulin
IHC	immunohistochemistry
IIV	inactivated whole virus influenza vaccine
LAIV	live attenuated influenza virus vaccine
MDCK	Madin Darby canine kidney
MEM	minimal essential medium
NP	nucleoprotein
PBMCs	peripheral blood mononuclear cells
PFU	Plaque forming units
TCID50	tissue culture infectious dose 50
TIV	trivalent inactivated virus vaccine
TPCK	tosyl phenylalanyl chloromethyl ketone
VAERD	vaccine-associated enhanced respiratory disease