The Subgroup on Public-Private Mix for TB Care and Control (PPM Subgroup) was established by the global Stop TB Partnership's DOTS Expansion Working Group to help promote and facilitate active engagement of all relevant public and private health care providers in TB control. The members of the Subgroup include representatives from the private sector, academia, country programme managers, policy makers, field experts working on the issue, international technical partners and donor agencies.  

At the first meeting of the Subgroup in November 2002, generic regional and national PPM strategies were developed and endorsed. The second Subgroup meeting, which was held in the WHO Regional Office for South-East Asia in February 2004, reviewed the growing evidence base emerging from numerous PPM initiatives. The second  meeting also broadened the scope of PPM to include the involvement of public sector providers not yet linked to NTPs. The third Subgroup meeting, held in Manila April 2005, identified barriers and enablers for scaling up and sustaining PPM and also endorsed the global PPM guidance document prepared by the Subgroup secretariat. The Fourth Subgroup meeting had PPM for TB care  and control in Africa as the main focus. It examined how successful PPM approaches within Africa can be scaled up and how approaches in other regions can be adapted to the African settings.