Fig 1. A PET CT scan of the lung area of rhesus and cynomolgus macaques infected with Mtb. Rhesus macaques have a more severe lymph node disease compared to cynomolgus macaques. The green circle indicates lymph nodes. Red, orange and yellow areas indicate inflammation. Image republished with permission from PLOS from https://doi.org/10.1371/journal.ppat.1007337.