表 1. General data of hand, foot, and mouth disease (HFMD) in Chengdu in 2012–2020.

2012–2020年成都市手足口病发病基本情况

Year	Number of cases	Incidence (/105)*	Number of severe cases	Rate of severe cases (/105)*	Number of deaths	Mortality (/105)
Rate of severe cases: The proportion of severe cases in the new cases; Mortality: The proportion of death cases in the new cases. * The incidence (χ2=25492.745, P<0.05) and rate of severe cases (χ2=1795.457, P<0.05) varied statistically from year to year.
2012	22739	193.80	190	835.57	2	8.80
2013	20833	175.36	527	2529.64	6	28.80
2014	38040	237.18	441	1159.31	2	5.26
2015	25890	151.27	252	973.35	1	3.86
2016	40411	228.05	501	1239.76	4	9.90
2017	25320	137.50	172	679.30	1	3.95
2018	61810	326.43	90	145.61	0	0.00
2019	34959	185.03	22	62.93	0	0.00
2020	22112	145.50	6	27.13	0	0.00
Total	292114	200.18	2201	788.28	16	5.73