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IMRCPOXY4
Record date of fourth chicken pox shot: Year

Codes and Frequencies



An 'X' indicates the category is available for that sample

0000NIUXXXXXXX
19801980·······
19811981·······
19821982·······
19831983······X
19841984·······
19851985······X
19861986·····XX
19871987X······
19881988···XXX·
19891989··X··X·
19901990···X··X
19911991·X·X··X
19921992·XX····
19931993X·X····
19941994···XX··
19951995···X·XX
19961996X·X·XX·
19971997···XX··
19981998··X·X··
19991999·X·····
20002000XX·X···
20012001·X·····
20022002·······
20032003X······
9997Unknown-refused···XXX·
9998Unknown-not ascertained···X···
9999Unknown-don't knowXXXXXXX