Assertion: vaccine | /r/HasProperty | available to protect
Facets:
value: by the late 1960s
type: TEMPORAL
Source sentences:
text: In 1963 the measles vaccine was developed, and by the late 1960s, vaccines were also available to protect against mumps (1967) and rubella (1969).
text: Today, conjugate vaccines are available to protect against Hib, pneumococcal and meningococcal infections.