CDC A preparation that is used to stimulate the body's immune response against diseases.
NIH Vaccines stimulate the immune system to produce immune responses that protect against infection.
WHO Vaccines reduce risks of getting a disease by working with your body’s natural defences to build protection.
Webster A preparation that is administered (as by injection) to stimulate the body's immune response against a specific infectious agent or disease: such as…
Cornell Vaccine The term “vaccine” means any substance designed to be administered to a human being for the prevention of 1 or more diseases
Oxford Any preparation of immunogenic material suitable for the stimulation of active immunity in animals without inducing disease.
6 definitions of vaccine that nicely describe Vitamin D
https://vitamindwiki.com/tiki-index.php?page_id=14185
CDC A preparation that is used to stimulate the body's immune response against diseases.
NIH Vaccines stimulate the immune system to produce immune responses that protect against infection.
WHO Vaccines reduce risks of getting a disease by working with your body’s natural defences to build protection.
Webster A preparation that is administered (as by injection) to stimulate the body's immune response against a specific infectious agent or disease: such as…
Cornell Vaccine The term “vaccine” means any substance designed to be administered to a human being for the prevention of 1 or more diseases
Oxford Any preparation of immunogenic material suitable for the stimulation of active immunity in animals without inducing disease.
Those are great, Henry -- thank you.