- 86 The CPT has recommended that a very high priority be given to measures to reduce overcrowding in the Greek prison system. The facts found during the course of the CPT's visit demonstrate that, as a consequence of the present level of overcrowding, the Greek State is not discharging - vis-à-vis many persons at least - the fundamental responsibility to detain prisoners under conditions which respect the inherent dignity of the human person. 273. It is also clear that the Greek prison system is seriously under resourced from the point of view of staff. At the time of the delegation's visit, some 25% of the 2250 posts making up the official staff complement were vacant; and this latter figure had been calculated on the basis of a prison population of 4500, not 6700. The CPT's delegation saw for itself that the ratio of staff to prisoners could, on occasion, be alarmingly low. An inadequate staff/prisoner ratio not only renders the provision of an acceptable regime well-nigh impossible, but also generates an insecure environment for both staff and prisoners. The CPT has therefore recommended that appropriate steps be taken to fill all vacant prison staff posts and that the existing official staff complement be reviewed, in order to ascertain whether it is adequate in the light of current and envisaged prison population levels. 274. In addition to the above-mentioned general recommendations, the CPT has made a series of recommendations and comments concerning material conditions of detention and out-of-cell activities in the different establishments visited. Particular mention should be made of the recommendation that the relocation of the seven high security male prisoners, currently occupying a whole wing (designed for 90 or more prisoners) of the Korydallos Prison for women, be accorded the highest priority. The CPT would add that it fully supports the measures designed to improve conditions of detention at Larissa Prison, identified in the report which followed the inspection of that establishment by the Greek authorities (cf. paragraph 271, second sub-paragraph). Recommendations and comments have also been made on various other questions of relevance to the CPT's mandate, and in particular arrangements for visits, procedures and facilities in the area of discipline and segregation, complaints and inspection mechanisms, and the separation of different categories of prisoners. 275. A number of recommendations have been made as regards health-care services in the prisons visited, in particular with a view to improving staffing levels, which were quite inadequate at the time of the visit. It should be emphasised, however, that a satisfactory level of health care will almost certainly remain unattainable until such time as the general problems of overcrowding, poor hygiene and inadequate regime activities are resolved. The CPT was dismayed to learn that prisoners known to be HIV positive were held in isolation at Korydallos Prison Hospital. The Committee must emphasise that there is no medical justification for the isolation of an HIV positive prisoner. It has recommended that the present policy of isolating HIV positive prisoners be progressively abandoned.