“…In general, LIF based systems promise to be able to differentiate bioaerosol particles from most non-bioaerosol particles (e.g., [27,29,19,83,62,65,41]); discriminate biothreat agents from atmospheric aerosol particles; and classify different bioaerosol species such as pollen versus fungi, as shown in Fig. 3(a) [42,58,71,97,44,45,28]. But keep in mind, not all fluorescent particles are bioaerosols, and also some biomolecules contained aerosol particles may be below the fluorescence detection threshold.…”