Abstract
We orally administered Chlorella pyrenoidosa to mice 1 week before infection with the influenza virus up to 14 days after infection, and investigated its effects on mice with the viral infection. The survival rate was determined using the Kaplan-Meier cumulative survival curve, and the distilled water- and Chlorella-administered groups were assessed using the log-rank test. The duration of survival of the Chlorella-administered group was significantly extended (P=0.0394), and Chlorella showed high efficacy against influenza infection.