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

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).