MX1 and infection: Both interferons induce the expression of many genes including viperin (also known as vig1 or rsad2) and MXA. To analyse the kinetics of expression of host antiviral genes during the course of the infection, we measured by qRT-PCR the expression of ifnφ1, ifnφ3, and viperin at 6, 8, 12, 24, 30 and 48 hpi (Figure 6).