 Despite the multifaceted role of the immune system and its importance in promoting survival and persistence of all forms of life (Pradeu 2012: 22–32), immunology has traditionally been of minor interest to philosophers of biology (cf. Hull and Ruse 2007; Sarkar and Plutynski 2010). However, increased attention has recently been directed to address a range of ontological and epistemological problems related to immune phenomena. These studies have focused upon the “immune self”, the central motif of biological identity in the context of immunity (Tauber 1994; Pradeu 2012). Ranging over diverse topics, including personal identity (Howes 1999), ethical and anthropological concerns with human self-image (Sontag 1990; E. Martin 1994), and poststructuralist, constructivist and feminist notions of identity (Derrida 2003; Haraway 1989; Weasel 2001), philosophers have invoked immunological conceptions of selfhood. Moreover, the examination of immunology has proven increasingly useful in addressing philosophical problems pertaining to other fields of study such as ecology (Tauber 2017), neuro- and cognitive sciences (Varela et al. 1988), developmental biology (Fagan 2007), microbiology (Méthot and Alizon 2014) and evolutionary biology (Hull, Langman, and Glenn 2001). This increased recognition of immunology in philosophy of biology not only reflects a growing trend towards more inclusive approaches, more generally, but also contributes to the intensifying effort to understand ecological dynamics that range from microbial interactions to climate change (O’Malley and Dupre 2007; O’Malley 2014).