Fig 2.

Removal of aerosolized bovine coronavirus in a velocity wind tunnel. The log reduction (base 10) in bovine coronavirus aerosol concentration after passing through filters at a face velocity of 0.51 m s⁻¹. Log reduction is based upon virus titration, for impactor sampled particles (larger than ~200 nm in diameter) (A). RT-qPCR, for impactor sampled particles (larger than ~200 nm in diameter) (B). Virus titration, for virus recovered from a total filter (smaller than 200 nm in diameter) (C). RT-qPCR, for virus recovered from a total filter (D).