Table 1.

Diagnostic classifications of COVID-19 (based on data from [7])

Epidemiological history	a. A history of travel or residence in areas with a wide spread diffusion of COVID-19 within 14 days prior to the onset of symptoms. b. Direct contact with SARS-CoV-2-infected individual (positive nucleic acid test) within 14 days before the onset of symptoms. c. Direct contact with a patient who has symptoms of fever and/or respiratory infection from areas with a wide spread diffusion of COVID-19 within 14 days prior to the onset of symptoms. d. Cluster onset.
Clinical manifestations	a. Fever and/or respiratory symptoms. b. Pulmonary imaging with signs of COVID-19. c. Laboratory tests suggesting early stage of disease: total white blood cell count normal or decreased with decreased lymphocyte count.
Suspected case	Individual who meets one of the epidemiological history criteria combined with two of the clinical manifestations, or who meets all three of the clinical manifestations.
Confirmed case	Suspected case with RT-PCR positive detection of SARS-CoV-2 nucleic acid, or highly homologous viral gene sequencing to the known SARS-Cov-2.