Figure 4From: Development of a reverse genetics system for respiratory syncytial virus long strain and an immunogenicity study of the recombinant virusStability research of the recovered virus rLong-ΔG-EGFP. A-I represented nine consecutive passages of rLong-∆G-EGFP on Hep-2 cells, Auto-fluorescence was observed. J, negative control without fluorescence.Back to article page