Serious side affects listed just for a measles vaccine:
"Patient Information (Source:Multum)
Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).
You should not receive a booster vaccine if you had a life-threatening allergic reaction after the first shot.
Keep track of any and all side effects you have after receiving this vaccine. When you receive a booster dose, you will need to tell the doctor if the previous shots caused any side effects.
Becoming infected with measles, mumps, or rubella is much more dangerous to your health than receiving this vaccine. However, like any medicine, this vaccine can cause side effects but the risk of serious side effects is extremely low.
Call your doctor at once if you have any of these serious side effects:
- red, tender bumps under your skin;
- a light-headed feeling, like you might pass out;
- high fever (within a few hours or a few days after the vaccine);
- easy bruising or bleeding;
- new or worsening cough, trouble breathing;
- problems with balance or muscle movement;
- a seizure; or
- nervous system problems--numbness, pain, tingling, weakness, burning or prickly feeling, vision or hearing problems, trouble breathing."
These are rare, but still a risk for anyone. You won't know if you will have these reactions until you've already had the vaccine.