C
A
B
D
mucociliary escalator
capsules
IgA
Laryngitis
Alveolar macrophages
Ghon complexes
otitis media
quellung reaction
Psittacosis
erythrogenic toxin
rubella
cytokine storm
acyclovir
antigenic drift
MMR
spherules
capsule
aspergillomas
the desert southwest
arthrospores