Mortality
To evaluate the potency of Morus alba L.-induced immune responses against a lethal infection with influenza virus, vaccinated mice were challenged with mouse-adapted H1N1 influenza A subtypes. The protective efficacies were measured by survival rates monitored every day for 14 days. As shown in Fig. 6B, Morus alba L. adjuvants enhanced mouse survival rates post-challenge with a single-dose of HA vaccine. The protective efficacy of the non-adjuvanted vaccine was only 50%. However, mice given Morus alba L. adjuvant were protected against the viral challenge.