Blood investigations
| Results Prior to COVID-19 infection (September 2019) | Results 9 January 2021 | Results 13 February 2021 | Results 7 April 2021 | Range | |
| TSH | 0.3 | 0.009 | 0.009 | <0.008 | 0.3–3 μIU/mL |
| Free thyroxine | 15 | 38.81 | 20.11 | 29.56 | 11.9–20.3 pmol/L |
| Free triiodothyronine | 5 | 14.8 | 13.1 | 3.5–6.5 pmol/L | |
| TSH receptor antibody | 6.9 | 0.1–1.0 IU/L | |||
| Antithyroid peroxidase antibody | <10 | 0.0–50 IU/mL | |||
| White cell count | 9.46 | 4.3–11.4×109/L | |||
| Neutrophils | 6.03 | 1.9–7.7×109/L | |||
| C reactive protein | 11.2 | 0–5 mg/L | |||
| Erythrocyte sedimentation rate | 19 | 17–21 mm first hour |
TSH, thyroid stimulating hormone.