Protection from fatal diseases is necessary for healthy living. vaccination was discovered for not allowing certain diseases to affect human body at all. Certain medications are injected in the body and develop immunity to fight respective diseases for life-long. In all, it is a shield that protects from certain fatal diseases.
In case of chronic illnesses like diabetes, asthma, heart diseases etc., people are recommended to be vaccinated so that the immunity to fight health problems can develop. However, in such cases, consulting a doctor is necessary before getting vaccinated because there could be a fear of side-effects and unsuitability to the body.