Even though HTLV-1 is not in the same league with HIV, it has been implicated in some pretty nasty scenarios, including nerve diseases and a rare form of leukemia. I want to inform, not frighten, but there you are. The test for HTLV-1 can give false positive results, so retesting is in order. You really should have a repeat test. The virus has some relatively favorable character traits.
Illnesses associated with it tend to be rare ones, for example.
And you can take some comfort in the fact that the virus is not easily transmitted. Most people with HTLV-1 harbor the virus all their lives with impunity, even to the point of never being made sick from it. Still, the virus demands respect. For example, patients should use condoms to protect others during sexual activity. No one wants to risk transmission, no matter how remote that might be.