Yes. Breastfeeding individuals under the age of 50 can receive the nasal spray flu vaccine as long as they do not have any symptoms or conditions that would prevent them from receiving it. If interested, consult your healthcare provider to see if the vaccine is suitable. Yes. Breastfeeding individuals under the age of 50 can receive the nasal spray flu vaccine as long as they do not have any symptoms or conditions that would prevent them from receiving it. If interested, consult your healthcare provider to see if the vaccine is suitable.