Figure 1From: Neonatal influenza infection causes pathological changes in the mouse brainDose-dependent survival rates of intraperitoneal influenza virus infection in 5-day-old mice. Mice were infected with increasing doses of the A/NWS/33 virus, and their survival rates were observed for 3 weeks. The LD50 of the A/NWS/33 virus in neonatal mice was determined to be 103 TCID50/mL by intraperitoneal injection (n = 10/group).Back to article page