Assertion: vaccine | /r/HasAspect | fewer antigens
Facets:
value: because of developments in vaccine technology
type: CAUSE
Source sentences:
text: Although the number of vaccinations recommended is greater than ever before, the vaccines used in the current immunization schedule actually have fewer antigens (inactivated or dead viruses and bacteria, altered bacterial toxins, or altered bacterial toxins that cause disease and infection) because of developments in vaccine technology.