How old was [NAME] when the first POLIO dose was given?
Categories
Value
Category
-99
Don't know
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
21
23
24
25
36
38
44
47
101
.M
Sysmiss
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.