Table 1

SARS-CoV-2 testing and cycle threshold (Ct) values over a 154-day timeframe

 Date Test result Source of specimen SARS-CoV-2
 cycle threshold (Ct)		 Testing platform
Day 1: 2 April 2020PositiveNasopharynx-oropharynxORF1a 15.49, E 16.08Mayo Clinic Roche C6800*
Day 8: 9 April 2020PositiveNasopharynxN1 24.6, N2 23.8Cepheid GeneXpert†
Day 17: 18 April 2020PositiveNasopharynxN1 29.2, N2 30.0Yale CDC laboratory developed test‡
Day 43: 14 May 2020NegativeNasopharynxNot applicablePanther TMA§
Day 46: 17 May 2020PositiveNasopharynxN2 40, E 0.0Cepheid GeneXpert†
Day 49: 20 May 2020NegativeNasopharynxNot applicableYale CDC laboratory developed test‡
Day 51: 22 May 2020NegativeNasopharynxNot applicablePanther TMA§
Day 56: 27 May 2020NegativeNasopharynxNot applicableThermo Fisher¶
Day 108: 17 July 2020NegativeNasopharynxNot applicableCepheid GeneXpert†
Day 129: 6 August 2020PositiveNasopharynxN2 38.4, E 35.4Cepheid GeneXpert†
Day 144: 20 August 2020PositiveNasopharynxN2 43.1, E 0Cepheid GeneXpert†
Day 148: 24 August 2020**NegativeNasopharynxNot applicablePanther TMA§
Day 154: 30 August 2020NegativeNasopharynxNot applicableCepheid GeneXpert†

  • *Mayo Clinic Laboratories, Rochester, Minnesota, USA

  • †Cepheid, Sunnyvale, California, USA.

  • ‡Yale Virology Lab, New Haven, Connecticut, USA.

  • §Hologic, San Diego, California, USA.

  • ¶Thermo Fisher Scientific, Waltham, Massachusetts, USA.

  • **Received remdesivir on 24–30 August 2020.

  • E, SARS-CoV-2 E gene; N1, SARS-CoV-2 Nucleocapsid gene 1; N2, SARS-CoV-2 Nucleocapsid gene 2; ORF1a, SARS-CoV-2 Open Reading frame 1a gene.