design: 200ul of UTM buffer in which the swab was stored  was used for viral DNA extraction using High Pure Viral Nucleic Acid kit. 2 ul of the viral DNA extraction was used to enrich circular DNA molecules using rolling-circle amplification (RCA) with the phi29 kit (Watchmaker). This was then used to prepare Illumina sequencing library using Illumina DNA LP (M) Tag 96 sample preparation kit (Illumina, USA). This was sequenced at Psomagen Inc (USA) on an Illumina NovaseqX Psomagen Inc (USA).