项目/月份

1~3 (32, 33.3%)

4~6 (18, 18.7%)

7~9 (11, 11.5%)

10~12 (35, 36.5%)

合计(%)

15

11

7

19

52 (54.2)

17

7

4

16

44 (45.8)

>3月龄

22

14

6

22

64 (66.7)

≤3月龄

10

4

5

13

32 (33.3)

城市

7

12

9

10

38 (39.6)

农村

25

6

2

25

58 (60.4)

接触史

0

0

0

5

5 (5.2)

疫苗接种史

12

11

7

23

53 (55.2)