Assertion: rsv vaccine | /r/CapableOf | use traditional methods
Facets:
value: for more than 50 years
type: TEMPORAL
Source sentences:
text: Scientists have tried to create an RSV vaccine using traditional methods for more than 50 years -- and so far, none has worked.
text: Producing RSV vaccines using traditional methods usually leads to F proteins in the second shape and a poor antibody response.