Effects of policies and containment measures on control of COVID-19 epidemic in Chongqing

Table 1 Number of confirmed cases from January 1 to March 15

Date	New confirmed cases	Total confirmed cases
January 21-22	9	9
January 23-291,2	156	165
January 30-February 5	224	389
February 6-123	129	518
February 13-19	42	560
February 20-26	16	576
February 27-March 4	0	576
March 5-11	0	576
March 12-15	0	576

¹January 23, 2020: The lockdown of Wuhan.

²January 24, 2020: Initiated the first-level response to major public health emergencies.

³February 7, 2020: Implemented the closed management of residential communities.

Table 2 Numbers of deaths and discharged cases from January 1 to March 15

Date	New deaths	Total deaths	New discharged cases	Total discharged cases
January 21-22	0	0	0	0
January 23-291,2	0	0	1	1
January 30- February 5	2	2	14	15
February 6-12	1	3	87	102
February 13-19	2	5	172	274
February 20-26	1	6	110	384
February 27- March 4	0	6	118	502
March 5-11	0	6	52	554
March 12-15	0	6	16	570

¹January 24, 2020: Treated all confirmed patients of best efforts.

²January 29, 2020: Implemented the “one team of medical experts for each patient” treatment for critical patients.

Table 3 Numbers of suspected cases, close contacts, and people under medical observation from January 1 to March 15

Date	New suspected cases	Total suspected cases	New close contacts	Total close contacts	People under medical obeservation5
January 21-22	13	13	94	94	83
January 23-291,2	622	635	3525	3619	1381
January 30-February 5	1246	1881	8081	11700	5949
February 6-123,4	1128	3009	7225	18925	6980
February 13-19	510	3519	3775	22700	4403
February 20-26	105	3624	741	23441	1211
February 27- March 4	25	3649	171	23612	416
March 5-11	6	3655	69	23681	185
March 12-15	0	3655	35	23716	77

¹January 23, 2020: The lockdown of Wuhan.

²January 24, 2020: Initiated the first-level response to major public health emergencies.

³February 6, 2020: Released the prevention and control plan of COVID-19 (Third Edition).

⁴February 7, 2020: Implemented the closed management of residential communities.

⁵Mean (weekly).

Table 4 Incidence rate, cumulative incidence rate, and ratio of deaths, discharged cases, and critically ill cases from January 1 to March 15

Date	Infection fatality rate	Ratio of discharged cases	Ratio of critically ill cases3	Incidence rate (1/100000)	Cumulative incidence (1/100000)
January 21-22	0.000	0.000	0.170	0.029	0.029
January 23-291,2	0.000	0.006	0.120	0.499	0.528
January 30- February 5	0.005	0.039	0.080	0.717	1.245
February 6-12	0.006	0.197	0.070	0.413	1.658
February 13-19	0.009	0.489	0.060	0.134	1.792
February 20-26	0.010	0.667	0.040	0.051	1.844
February 27-March 4	0.010	0.872	0.010	0.000	1.844
March 5-11	0.010	0.962	0.000	0.000	1.844
March 12-15	0.010	0.990	0.000	0.000	1.844

¹January 24, 2020: Treated all confirmed patients of best efforts.

²January 29, 2020: implemented the “one team of medical experts for each patient” treatment plan for critical patients.

³Mean (weekly).