Every single medicine has some side effect, but we don’t ban all medicine.  In most cases vaccinations may have some mild side effects:  “DTaP/IPV/Hib: The vaccines against diphtheria, tetanus, pertussis, polio and Hib may cause redness and swelling on the site of vaccination, which lasts a few days. Babies may have a mild fever for up to ten days following the jabs.PCV: Redness and inflammation at the injection site affects about one in seven children. Mild symptoms of irritability, raised temperature and digestive disturbance may occur.MenC: Swelling and redness at the injection site is common. Some toddlers have disturbed sleep and some a light fever within a few days of their jab. Older children may complain of a mild headache.  MMR: Cold symptoms, a fever and swollen salivary glands may be noticed in children any time from a few days to three weeks after their MMR jab. Some may develop a rash or lose their appetite for up to ten days.” [1]  The side effects are very low compared with those associated with the diseases themselves. Mild versions of the symptoms associated with the disease being vaccinated against are occasional side effects. Allergic responses are very rare.  [1] Babies and immunization, BBC Health  ,accessed 06/13/2011