There is no health risk associated with getting a flu vaccine when already sick with the flu, according to The Ohio State University. For best results, an individual with a fever over 99.5 degrees Fahrenheit should wait for her fever to subside before getting a flu shot.
People with a severe allergy to eggs should avoid getting a flu shot, states Columbia University Medical Center. Additionally, individuals who developed Guillain-Barré syndrome after a previous flu vaccination should also avoid flu shots, notes The Ohio State University.
The flu vaccine provides 60 percent protection to people exposed to the flu, reports Columbia University Medical Center. Vaccinated individuals who do develop the flu typically experience lesser symptoms than people who are not vaccinated.