Description
For sample children under 18 years old who have an immunization record and who have at least four chickenpox shots on their record, IMRCPOXY4 reports the year of the person's fourth chickenpox shot.
Users should combine IMRCPOXY4 with IMRCPOXMO4, which reports the month of the person's fourth chickenpox shot, in order to get the complete date of the person's fourth chickenpox shot.
Users are strongly encouraged to visit the Universe tab for more information on changes in the universe across surveyed years.
