Fig. 1.

Virus growth in primary human lung epithelial cells infected with MERS-CoV and SARS-CoV-2. Primary human pulmonary alveolar cells were infected with SARS-CoV-2 or MERS-CoV at an MOI of 0.01. Viral titers were measured in Vero cells by plaque assay on days 2, 4 and 6 p.i. Data are the mean of three experiments with standard deviations