C2 noun /ˌriːkruːˈdɛsəns/
recrudescence
Wiederaufleben
Meaning
a new outbreak or revival of something that had subsided, especially an undesirable condition
Example
Health officials warned of a recrudescence of measles in several districts.
Gesundheitsbehörden warnten vor einem Wiederaufleben von Masern in mehreren Bezirken.