Thanks! I don't speak German but it looks like there were 341 who took the vaccine, 319 who took the placebo and 1 who got sick in each of those groups. Solve f

Thanks! I don't speak German but it looks like there were 341 who took the vaccine, 319 who took the placebo and 1 who got sick in each of those groups. Solve for e in (1 - e) * (1 / 319) = 1 /341 and you get 6.5%. Almost...