Prior to each stay abroad within the meaning of the selection criteria, a medical consultation by an authorised physician is required who understands the particular climatic and health conditions and who understands the medical capacity at the intended place of deployment. The advice includes, in particular, the necessary malaria and vaccination prophylaxis. In the event of special conditions, depending on the location and type of deployment (e.g. particularly poor medical care, constantly changing location, particularly high risk of infection, special occupational stress), a medical examination is required regardless of the duration of the work stay. An initial examination is not necessary before beginning a period abroad if the return examination was not more than one year ago.