Original sentence: Increased blood flow only lasts a few minutes, and any observed damage to the immune system is undone within a few days.It was previously believed that any link was due to poppers having a causative link with Kaposi's sarcoma,.Research is contradictory as to whether there is a causative link between popper use and HIV in men who have sex with men.however, present evidence points towards such a link being due to increased blood flow through the sexual organs and decreased immune response
Edited sentence: <ref> <ref> A suppressed immune system increases susceptibility to infections, including HIV.However,Researchers have demonstrated an association between popper use and HIV acquisition, but research results are inconsistent,.There is, also, evidence that poppers may weaken the immune system