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Propagation of viral bioaerosols indoors
Fig 2
Schematics of experimental configurations imitating a staircase.
(A) generators on the bottom and (B) generators on the top. (1) atomizers, (2) box walls, (3) laser, (4) laser beam, and (5) photodetectors.
doi: https://doi.org/10.1371/journal.pone.0244983.g002