I think flu shots are insane, actually. There's just no way they can inoculate you against all the many viruses out there, and the shots themselves will make you sick. In fact, if your baby ends up in the hospital, make sure you have 100% consultation on all shots given to your child and don't ever let them adminster a "cocktail" shot of more than one vaccine. Most cases of autism can be linked to vaccines and the mercury poisoning it caused. The only really safe vaccines are the ones they've been giving for more than 50 years, such as polio.
A better option for flu management are the microbial balancing solutions from Perelandra. Here's a link: