TLR7 and influenza: (A) Quantification of IFNα and TNFα in supernatants of human pDCs cocultured with DENV-infected (DENV cells) or uninfected BHK-21 cells (Mock), in presence of synthetic TLR7 agonist: Imiquimod; IMQ; 1 μg/mL or influenza infectious supernatant; Flu; 3 × 103 FFU.