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.
1 Cooperation with the UNHCR: Under Article 35 of the Refugee Convention and Article II of the 1967 Protocol, states agree to cooperate with United Nations High Commissioner for Refugees (UNHCR) in the exercise of its functions and to help UNHCR supervise the implementation of the provisions in the Convention.