Human T-lymphotropic virus. The human T-lymphotropic virus or human T-cell lymphotropic virus (HTLV) family of viruses are a group of human retroviruses that are known to cause a type of cancer called adult T-cell leukemia/lymphoma and a demyelinating disease called HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP).
The Geneva convention doesn't apply to ISIS anyways as they are considered unlawful combatants. We ran into these gray area issues in Iraq as many of the insurgents were not locals, non-uniformed and not state sponsored.
When dealing with an Army that does not abide by Geneva convention then it should be scratched. with ISIS they should down all communications from cell phones towers, land lines and radio. Keep them from wreaking terror via the Internet and social media.