Table 1.

Chest X-ray dataset distribution over binary and multiclass classification scenarios. Training and validation images are combined for fine-tuning the deep learning models.

Dataset	Partition	Normal	Viral Pneumonia	Bacteria Pneumonia	Total/Partition	Total
Mendeley [54]: Binary Task: Two classes	Train	3,600	3,900	–	7,500	8,124
	Test	234	390	–	624
Chest X-ray [4]: Multiclass Task: Three Classes	Train	3,500	3,500	3,500	10,500	15,000
	Test	1,500	1,500	1,500	4,500