CBSE Class 9 Answered

Immunization is the process of making a person immune to a disease by increasing his/her adaptive immunity by a variety of methods. Vaccination is one such method used for some diseases.

Vaccination is the administration of a vaccine against a particular disease or a set of diseases. The vaccine develops adaptive immunity to a disease for that individual and prevents from further infection of that disease. Usually, a dead or weakened germ-causing that disease is given as a vaccine which stimulates body's antibodies against the germ preventing it to occur in future.

Immunization is a proven tool for controlling and eliminating life-threatening infectious diseases and is estimated to avert over between 2 and 3 million deaths each year. It is one of the most cost-effective health investments with proven strategies that make it accessible to even the most hard-to-reach and vulnerable populations. It has clearly defined target groups; it can be delivered effectively through outreach activities and vaccination does not require any major lifestyle change.