Non-metric multidimensional scaling based on two-dimensional Bray-Curtis dissimilarity. Colours indicate different cohorts: black (A), before OsHV-1 challenge; green (B), 24h after viral challenge; red (C), dead/moribund oysters; blue (D), survived oysters; yellow (E), control oysters at the end of the experiment. Shapes indicate different locations of origin of the oysters: circle, Patonga Creek; square, Shoalhaven River; star, Clyde River.