TASK DEFINITION: In this task, you are given one French sentence. The major part of the sentences talk about health-related topics, but some of the them describe an organization and its activities. Your job is to translate the given sentences into English.
PROBLEM: Chez l’homme, la plupart des cas sont relativement légers mais une petite proportion de patients développe une forme beaucoup plus sévère de la maladie.

SOLUTION: While most human cases are relatively mild, a small percentage of patients develop a much more severe form of the disease.

PROBLEM: - des postes opérationnels (experts techniques au sein des unités opérationnelles)

SOLUTION: - Operational posts (technical experts in the operational units)

PROBLEM: Ce serait dans un intérêt purement évolutif car la nouvelle souche est plus susceptible de survivre si elle ne tue pas son nouvel hôte humain.

SOLUTION:
This is of evolutionary value as the new strain is more likely to survive if it does not kill its new human host.