If people are affected by plague, then Qunoot-e-Naazila cannot be recited for them.
According to the Hanbali Madhab, Qunoot Naazila can be recited during difficult situations with the exception of plague.
Sayyidina Rasul-ullah (Sallaho Alaihe Wassallam) made the following Qunut Nazilah for the salvation of the weak and oppressed in Makkah: In his noble lifetime Sayyidina Rasul-ullah (Sallaho Alaihe Wassallam) offered supplication (du’aa’) at times of calamity on a number of occasions in the time of extreme distress and need thus beseeching Allah (SWT) for His Mercy and benevolence. Qunut Nazilah is different to Dua (Qunut) which is recited in Wit'r Salah daily.
