Don't worry. The mist for H1N1 is approved for two years old and up. I would speak with your granddaughter's pediatrician to ask about her risk of her receiving it so young. Most vaccines have a "test group" and are approved based on the success of that age group. We really don't know if younger than two will be successful. Ask her doctor.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics