12. About how long has it been since you had a flu vaccination (shot or nasal spray)?
WITHIN PAST YEAR () 1
WITHIN PAST 2 YEARS ................ () 2
WITHIN PAST 3 YEARS ................ () 3
WITHIN PAST 5 YEARS ................ () 4
MORE THAN 5 YEARS ................. () 5
NEVER........................................ () 00