Table 2.

Characteristics of the database used

S.No.	Authors	Image Type	No. of COVID+	No. of N/P
1	Zhao et al. [67]	CT	349	397
2	Ozturk et al. [47]	X-Ray	125	500 P
3	Soares et al. [56]	CT	1252	1230
4	Joseph Chohen [27]	X-Ray	288	1374P/2000 N
5	Zhou et al. [69]	CT	2933	2500
6	Joseph [26]	X-Ray	25	25 N
7	Wang & Wong [59]	X-Ray	183	8066 N/ 5521P
8	Mooney [42]	X-Ray	–	1341 N/1345P
9	Siram [54]	X-Ray	2000	–