Figure 1: Shows the effect of different dose of lived, UV-inactivated, and heatinactivated NDV AF2240 on TNF-α induction in RAW 264.7 macrophages cells. Cells were co-cultured for 24 hours with different HA of the virus, the level of TNF-α in the culture supernatants were determined by ELISA. Data were expressed as mean ± SEM *P<0.05 when compared with the negative control.