Assertion: vaccine's antigen | /r/HasProperty | presented to immune system
Facets:
Source sentences:
text: Vaccination with RNA induces a primary response (top) by instructing the body’s cells to produce an antigen that is presented to the immune system.
text: In the 1990s, people in the US started using acellular vaccines (contained small portions of the bacterium), that had lower side effects but were also less effective at triggering an immunological memory response, due to the antigen presented to the immune system being less complete.