Table 1.

Description of datasets for COVID-19 classification.

Class	Reference	Samples
Normal	RSNA pneumonia detection challenge [20]	607
Pneumonia	RSNA pneumonia detection challenge [20]	607
COVID-19	COVID-19 image data collection [21]	468
	Figure 1 COVID-19 Chest X-ray [22]	35
	Actualmed COVID-19 Chest X-rays [23]	58
	COVID-19 Radiography Database [24]	46
Total		1821