From: Maternal and perinatal factors associated with hospitalised infectious mononucleosis in children, adolescents and young adults: record linkage study
Parity
Without IM
With IM
No.
%
0
104210
42.0
87
38.7
1
88997
35.9
84
37.3
2
36081
14.5
37
16.4
3
12101
4.9
9
4.0
4 or more
6897
2.8
8
3.6
Total
248199
100.0
225