Fig. 1

Bovine coronavirus (BCoV) contaminated human nasal mucosa. Log₁₀ genome copies of BCoV per positive swab. Personnel had close contact for at least ten minutes with calves shedding BCoV. Swabs were taken from human nostrils at different time points after exposure to the calves. The grey line shows the limit of quantification and the black short lines indicate median genome copies per positive swab