Immunization treatment involves administration of vaccines to developing artificial immunity against diseases. Immunization has proved to be an effective tool for prevention against several infectious and life-threatening conditions. They are cost-effective and easily available. Governments of most countries offer free immunization drives for prevention against common diseases with the aim of complete irradiation of the ailment. Immunization treatments involve inoculating the patients with dead or weakened viruses of a disease. The virus upon entering the body activates the body's natural defense mechanism to produce antibodies that fight the infection and eliminate it. Once the body gains immunity against a disease in this manner, it becomes safe against all future attacks from the virus. In the absence of immunization, the only way our body can develop immunity against any disease is by contracting the disease and struggling to overcome it. As with any medication, there may be risks and side-effects associated with immunization treatments, however, they are mild and subside with time. Common side effects include pain or tenderness at the site of infection, headache, itching at the injection site, nausea, dizziness, fever or rash. It is a small price to pay for gaining immunity against many life-threatening diseases. Complications from vaccinations are rare. All vaccines have to meet stringent quality requirements before becoming available in the market. In the case of severe allergic reactions like difficulty in breathing, wheezing, change in a heartbeat, the patient should be taken to the hospital immediately.