Replication kinetics of influenza viruses in primary human ocular cells. HCEpiC (A), HConEC (B), and HTMC (C) were infected at an MOI of 0.01 with the indicated viruses. Culture supernatants were collected at the indicated times p.i., and titers were determined by plaque assay to quantify infectious virus. HP, highly pathogenic; LP, low pathogenic. The means from duplicate independent cultures per virus ± standard deviations are shown.