@Override
  public void step(SimState s) {
    SimpactII state = (SimpactII) s;
    state.addAttribute("HIVTest", false);
    // System.out.println("----------------------------HIV Test Campaign " +
    // state.schedule.getTime() + "----");

    for (int i = 0; i < numberOfTests; i++) {
      Agent target = findAgent(state);
      target.attributes.put("HIVTest", test(target));
      // if positive, counsel them to have fewer partners, but don't reduce infectivity
      if (test(target))
        target.DNP = partnersAfterTest; // note this might actually increase some individuals DNP
    }
  }