What's the recommended dose for a 5 year old 50 pound boy getting a flu shot?

0.5 ml: The dosage of flu vaccine is determined by age: for child under 3 years old, 0.25 ml; for one over 3 years, 0.5 ml.

INFLUENZA DOSE: The dose of influenza vaccine is 0.5ml . If the child has had 2 doses previously within the same flu season, just 1 dose is needed. If not, then 2 doses 4 weeks apart are indicated. Could also talk to doctor about FluMist (the nasal vaccine), if no contraindication to the route of administration.