Contrary to a lot of speculation that has been hitting the news lately, flu shots are actually completely safe. A lot of people tend to step back a bit when they learn that flu shots actually contain a deactivated version of the influenza virus. But this version is deactivated and will not cause you to get the flu. It is designed for your body to create antibodies that will be able to recognize the influenza virus and destroy it before it has the chance to do any harm to your body.
Yes, flu shots are completely safe. Like any vaccination however, there can be some side effects associated with the flu vaccine. The side effects associated with the flu shot are quite similar to a mild cold and can last between 1 and 2 days. Many people mistake this brief episode with a real illness and claim that the flu shot gave them the flu. This just isn't right. You will experience some adverse effects from the shot because it is doing its job. You feel briefly ill because your immune system is working to quickly create antibodies to fight the flu when it comes. So in a way you are giving a day or two of discomfort in order to protect yourself from two weeks of agony.