The text present a theory elaborated by Orstom researchers et al. about the co-evolution,
on the geological scale, of rodents and arenavirus (notably responsible for hemorrhage fever).
This thesis is supported by the fact that viruses are not the same from one continent to the other.

The argumentation is developed in the article.
The reference list relates to the work of J.P. Gonzales on this subject.
We also provide the wiki article about "Arenavirus"