Comparison of Different Waves during the COVID-19 Pandemic: Retrospective Descriptive Study in Thailand

Table 1

Cases and deaths across phases and waves during the COVID-19 pandemic.

Difference waves	Time period	Screening test n (%)	Confirmed case n (%)	Deaths n (%)
Phase I	January 2020	29,126 (0.0)	14 (0.0)	0
	February 2020	3,648,251 (32.0)	28 (0.0)	0
Phase II: first wave	March 2020	2,693,753 (24.0)	1,609 (1.0)	10 (1.0)
	April 2020	208,382 (2.0)	793 (0.4)	44 (4.5)
	May 2020	181,757 (2.0)	0	3 (0.3)
Phase III	June 2020	170,320 (1.0)	0	1
	July 2020	175,275 (2.0)	0	0
	August 2020	178,357 (2.0)	0	0
	September 2020	173,078 (2.0)	1 (0.0)	1
	October 2020	152,552 (1.0)	6 (0.0)	0
	November 2020	1,115,005 (10.0)	4 (0.0)	1
Phase IV: second wave	December 2020	293,928 (3.0)	2,415 (2.0)	1
	January 2021	518,255 (5.0)	11,454 (7.0)	16 (1.6)
	February 2021	378,673 (3.0)	6,858 (4.0)	6 (0.6)
	March 2021	405,822 (4.0)	2,585 (2.0)	11 (1.1)
Phase V: third wave	April–May 2021, continues	1,075,928 (9.0)	134,025 (84.0)	937 (90.9)
Total		11,398,462 (100.0)	159,792 (100.0)	1,031 (100)