https://www.cdc.gov/flu-resources/php/resources/vaccine-live-intranasal.html
Influenza (Flu) Vaccine (Live, Intranasal) | Flu Resource Center | CDC
Vaccine Information Statements (VISs) are information sheets produced by the CDC that explain both the benefits and risks of a vaccine to vaccine recipients.
flu vaccineresource centerinfluenzaliveintranasal