Vaccination and immunisation are two different processes. Vaccination only refers to the administration of a vaccine or toxoid, while immunisation is the process by which the body produces antibodies against the vaccine preventable diseases through administration of speÂ­cific vaccines. These are used to protect us and our domestic animals against viral and bacterial diseases.
convertase in Medicine. convertase conÂ·verÂ·tase (kÅn'vÉr-tÄs', kÉn-vÃ»r'-) n. An enzyme that catalyzes the conversion of a substance, such as complement, to its active state.
Last reviewed on RxList 9/3/2015. Activase (alteplase) is an enzyme, which works to break up and dissolve blood clots that can block arteries, used in the treatment of an acute heart attack or pulmonary embolism. The most common side effect of Activase is bleeding.