The immune genes’ mRNA levels in goats (SLC11A1, CD-14, CCL2, TLR1, TLR7, TLR8, TLR9, defensin, SP110, SPP1, BP1, A2M, ADORA3, CARD15, IRF3, and SCART1) varied between the healthy and infected goats with pneumonia [41]. Here, A2M is linked to pneumonia.