Figure 1From: Attenuation of influenza virus infectivity with herbal-marine compound (HESA-A): an in vitro study in MDCK cellsMTT optical densities for cell viability in response to different types of exposure of HESA-A and virus (averages of 4 independent tests) (mean ± SD). *: Significantly different from values obtained for the co-penetration treatment compared to the virus untreated sample (p < 0.05).Back to article page