Related Rule
Practice Relating to Rule 146. Reprisals against Protected Persons
Section C. Medical and religious personnel in the power of the adversary
Switzerland’s Basic Military Manual (1987), referring, inter alia, to Article 46 of the 1949 Geneva Convention I, states: “By virtue of the Geneva Conventions and their Additional Protocols, [reprisals] are prohibited with regard to … medical personnel”. 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 197(2).
Switzerland’s ABC of International Humanitarian Law (2009) states: “International humanitarian law does not include any general prohibition of reprisals. There are however numerous provisions that prohibit specific types of reprisal, in particular reprisals against Protected persons”. 
Switzerland, Federal Department of Foreign Affairs, ABC of International Humanitarian Law, 2009, p. 37.