Frequency of grade 1, 2 and 3 unsolicited adverse events recorded within 28 days post-vaccinations.

<p>Bars represent the maximum severity per volunteers within 28 days after either 2 vaccinations in Group A (separately for ADVAX and TBC-M4) or 3 vaccinations in Group B. Relative frequency of adverse events is plotted on the Y axis and Groups A, B vaccine or placebo recipients are plotted on the X-axis.