I will no longer do vaccines for anyone in my family, but it's a personal choice you need to make once you inform yourself fully.
Here's a great article detailing 10 facts about flu vaccines and the flu--
http://www.safeminds.org/fact-about-flu-vaccine/
In our family we plan on practicing good hygiene & continuing our vitamins, probiotics and daily Zinc, Vitamin C & Vitamin D, to strengthen our immunity & to reduce our risk of influenza.
If you do choose to do a flu shot, avoid the live flu vaccine -- flumist. And please look at this chart by the CDC of influenza vaccine manufacturers for 2013 (see link below). It lists which brands/formulations contain thimerisol (aka mercury), and which formulations are live vs. inactivated for the 2013-14 season. Please ensure your child only gets a single dose flu shot without thimerisol if you feel a vaccine is warranted.
http://www.cdc.gov/flu/protect/vaccine/vaccines.htm
P.S. I did not come upon this decision lightly. I'm a nurse practitioner and I currently work in a large rehab facility/nursing home, so I see a lot of influenza and I'm exposed to it every season. After preaching the benefits of vaccines and recommending them to my patients for 20+ years I had a change of heart. This year, after many months of in-depth independent reading and research I had a paradigm shift in my thinking. I now realize vaccines aren't the 100% safe and effective intervention I'd been led to believe through my medical training.