APC	antigen-presenting cells
c-di-AMP	bis-(3′,5′)-cyclic dimeric adenosine monophosphate
CD	cluster of differentiation
CpG	CpG oligodeoxynucleotide.
CTB	cholera toxin B subunit
CTL	cytotoxic T lymphocytes
DPI	dry powder inhaler
ELISPOT	enzyme-linked immunospot
FPF	fine particle fraction
rHA	hemagglutinin
IgG	immune globulin
IL-2	interleukin 2
i.m.	intramuscular
IFNγ	interferon gamma
i.n.	intranasal
LN	lymph nodes
MMAD	mass median aerodynamic diameter
MHC	major histocompatibility complex
NiM	Nano-in-Microparticulate
NP	nanoparticles
OVA	Ovalbumin
s.c.	subcutaneous
Th1	T helper cell 1
TNFα	tumor necrosis factor alpha
TLR	Toll-like receptor
WHO	world health organisation