Do they give the live virus flu shot to babies?

The live attenuated influenza vaccine (LAIV), also known as the nasal spray flu vaccine, is not recommended for babies under 2 years of age. This is because babies' immune systems are not fully developed and may not be able to respond adequately to the live virus vaccine. Instead, babies under 2 years of age should receive the inactivated influenza vaccine (IIV), which is a shot that contains killed flu viruses.