FIG. 3.

Mannan inhibits infection of peritoneal Mφ by influenza virus. (A) Infection of peritoneal Mφ by 10⁶ PFU of influenza viruses BJx109, HKx31, and PR8 in the absence (■) or presence (□) of 5 mg of mannan per ml. Mannan was present both at the time of virus adsorption and during subsequent culture of the Mφ. (B) Effect of the time of addition of mannan on inhibition of infection of Mφ by BJx109 virus. Results are presented as the mean percent infection (and 1 standard error) from three experiments.