Flux ratios of the GRB 980425 host (red filled square) and the WR region (blue circle) compared with GRB 031203 (red arrow; Watson et al. 2011), LMC (red open square; Israel et al. 2010; Meixner et al. 2013), local star-forming galaxies (plusses; Moustakas & Kennicutt 2006; Kennicutt et al. 2011; Dale et al. 2007, 2012; Skibba et al. 2011), UV-selected galaxies (dots; Gil de Paz et al. 2007; irregular galaxies are marked as green triangles), irregular galaxies (triangles) and blue compact dwarfs (×; Hunt et al. 2005; Hirashita et al. 2008; Hunter et al. 2010). Low-z GRB hosts exhibit low 100 μm/NUV flux ratios, which hints at low dust attenuation similar to that of irregular galaxies.