SARS-CoV-2 RNA more readily detected in induced sputum than in throat swabs of convalescent COVID-19 patients

On admission, his white blood cell count was 6·62 × 109 per L, lymphocyte count was 2·02 × 109 per L, C-reactive protein level was 26·6 mg/L (normal range 0–8·0 mg/L), and fasting blood glucose level was 12·5 mmol/L. On admission, her white blood cell count was 4·01 × 109/L, lymphocyte count was 0·71 × 109/L, and C-reactive protein level was 2·58 mg/L. Sputum induction is a safe and simple non-invasive method for detecting various lung diseases.3 Moreover, the risk of medical staff exposure to COVID-19 is lower with sputum induction than with nasal or throat swabs and bronchoalveolar lavage methods.