Fig. 2. Epidemiological characteristics of COVID-19 outbreak in fitness center in Cheonan, Korea. (A) Epidemic curve. (B) Trend of the number of the people tested for COVID-19 and diagnosed. (C) Time dependent reproduction number (Rt) and 95% confidence interval (grey area).
On Feb. 18th, the patient 31 was diagnosed, and on Feb. 23rd, the National Alert level was elevated to Serious (Red). On Feb. 24 (red vertical line), the fitness centers outbreak was identified, and the contact tracing and isolation began.
COVID-19 = coronavirus disease 2019.