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Virus yield in the supernatant of porcine respiratory explants at 48 hpi. Three different inoculation doses were assessed for each virus: 104 (white bars), 105 (gray bars) and 106 plaque forming units (black bars). Bars show the mean and standard deviation of 4 repeats. Swine/Flanders/1/98 (sw/Fl/1/98) and duck/Italy/3139‐1/06 (dk/It/06) represent a swine‐adapted and non‐swine‐adapted influenza virus, respectively.
