Fig. 4

A Copper alloy was subject to two rounds of virus exposure. The first exposure is presented in red points and lines, and the second exposure is presented in blue points and lines. Each point represents the geometric mean of three biological replicates (n = 3). Error bars represent the standard deviation. Asterisks indicate at least one replicate was at or below the detection limit. Lines are not the result of any regression but help to visualize trends in the data. B ICP-OES of the samples collected for titering in A. Only the alloy’s major constituents are presented. Each bar represents the geometric mean of three biological replicates (n = 3) and are normalized to concentrations from the first exposure. Error bars represent the standard deviation