Figure 4 - Activation of innate immune system by TRLs.
From the following article
Antivirals become a broader enterprise
Jeffrey L Fox
Nature Biotechnology 25, 1395 - 1402 (2007)
doi:10.1038/nbt1207-1395
Modulating the host immune response with activators of TRLs is being tested as an approach to controlling viral infections.