Vaccination is safe, and side effects, such as a painful arm or a low fever, are usually small and short. Serious side effects are conceivable, but they are quite uncommon. Before being approved to be used, any licensed vaccination is extensively evaluated in various phases of trials, and it's frequently appraised once it's in use. Constantly monitoring data from a variety of sources for any indication that a vaccine might pose a health concern.
Click here to find more informations.