Snipit plot with nucleotide mutations for the five identified households with NGS data. Only mutated positions that are not common for the designated lineage (<75% GISAID sequences of the lineage) are shown. Mutations that are shared by less than 5% of the identified lineage (AY.129 for A, AY.4 for B,C, AY.43 for D, and B.1.617.2 for E) sequences in Switzerland in the week of sampling are indicated with a box: red for non-synonymous SNPs and blue for synonymous SNPs. (A) household USZ22, (B) household USZ29, (C) household USZ38, (D) household USZ36, and (E) household USZ39. Amino acid substitutions are indicated in gray on top of the non-synonymous mutations.