: The paper Peste des Petits Ruminants Vaccine (Nigerian Strain 75/1) Confers Protection for at Least 3 Years is highly "helpful" for understanding long-term immunity.

In an academic or research context, finding a "helpful paper" depends on whether you are exploring this through a , historical , or scientific lens. 1. Literary & Cultural Perspective

In scientific literature, "Peste" is frequently used in the context of , a significant viral disease affecting sheep and goats. If your search for "helpful paper" was related to this animal disease: