Figure 1.

A, Schematic single nucleotide polymorphism distribution (vertical black lines) along the SARS-CoV-2 chromosome for the 2 COVID-19 episodes. B, Human identity testing analysis was done by short tandem repeat PCR (Mentype Chimera Biotype, Germany) on the same samples used to perform the SARS-CoV-2 RT-PCR, and they were subsequently sequenced. Representative loci of the 12 noncoding short tandem repeat loci and the gender-specific locus amelogenin were analyzed. They were labeled with 3 different dyes (6-FAM, BTG, or BTY) using the Mentype Chimera PCR amplification kit (Biotype, Germany). Abbreviations: COVID-19, coronavirus disease 2019; PCR, polymerase chain reaction; RT-PCR, reverse transcription polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.