Figure 3

Start and end dates for SARS-CoV-2 post-introduction clades identified by analysis of the UShER phylogeny, with the start date defined as the date that descendants of the introduction were first sampled, and the end date defined as the last date that any descendants of the introduction were sampled. Introductions are color-coded based on the proportion of sampled individuals in the post-introduction clade that were from the University (green) or the local Community (blue). Light grey shaded region indicates a period of online-only instruction when fewer students were on campus. Introductions that were variants of concern or variants of interest are indicated in Figure S10.