Fig. 1.

Profiling of selected SARS-CoV-2 variants based on key mutations from N440K to T716I in a single amplicon in the spike protein. Even without the near universal D614G mutation, all current and previous VOC variants have a unique mutation profile in this amplicon window, except for BA.4/5, which are commonly reported together. While not shown, the only mutation in the primer sequences in any VOC is on the likely inconsequential K417.

Figure adapted from Outbreak.info (Tsueng et al., 2022), downloaded 2022–10–26.