The nasal spray is made from living and weakened virus. The jab is made from dead virus. You're more at risk of complications from the live virus and, as such,

The nasal spray is made from living and weakened virus. The jab is made from dead virus. You're more at risk of complications from the live virus and, as such, it's not recommended for tiny kids or adults over 50. https://www.webmd.com/a-to-z-guides/prevention-15/vaccines/flu-vaccine-which-type?page=2 https://www.webmd.com/a-to-z-guides/prevention-15/vaccines/f...