From a purely epidemic control point of view the most rational path is to test this population as often as possible (every 6 months or less) and treat them imme

From a purely epidemic control point of view the most rational path is to test this population as often as possible (every 6 months or less) and treat them immediately if testing positive. If you find people that reinfect rather than a bad thing this means you are being able to reach a core at-risk group.