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Administration method for second dose of H1N1 flu vaccine

Codes and Frequencies

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For sample children who had more than one H1N1 vaccine dose, VAC2H1N1MODE indicates whether the child's second most recent H1N1 flu vaccination was administered by injection or by nasal spray.

The survey questions associated with VAC2H1N1MODE were removed from the NHIS in August 2010.

VAC2H1N1MODE is part of a series of variables in 2010 dealing with immunization. For other related variables, please use the IPUMS NHIS search function and drop-down menus.


There are no comparability issues.


  • 2010: Sample children under 18 in quarters 1 and 2 and the first several weeks of quarter 3 who have more than one H1N1 vaccine dose.


  • 2010