Relative viral load at day 3/4 in % of day 1. Shown is the relative viral load on day 3/4 in percent of the viral load on day 1. The mean of the ct values at visit 1 was set 100% for both Iota-Carrageenan and placebo and the percent of the ct values on day 3/4 was calculated as described in materials and methods. The ct numbers of Iota-Carrageenan and placebo samples of day 1 and day 3/4 were compared by applying a Mann-Whitney U-test (p = 0.009). The black bar shows Iota-Carrageenan and the grey bar shows placebo.