live attenuated influenza vaccine (LAIV)

The live attenuated influenza vaccine (LAIV) is a type of flu shot made from weakened (attenuated) live viruses. It stimulates your immune system to recognize and fight the flu without causing the illness itself. LAIV is typically administered as a nasal spray and is often used for healthy, non-pregnant individuals aged 2 through 49. Because it contains live viruses, it triggers a strong immune response, helping your body prepare for real flu infections. It is an effective, needle-free option for flu prevention, providing protection during flu season.