Myth: If you get the flu vaccine, you will get influenza. This misperception is the reason many people cite for not protecting themselves by getting the flu vaccine each year. You may even know someone who will tell you that they had flu symptoms after getting the vaccine; however, the reason for such symptoms may include:
- A slight reaction to the vaccine that includes temporary muscle aches and fever
- Exposure to the flu before the vaccine can take effect—which takes two weeks
- Experiencing symptoms of another illness, such as a cold