The quantitative analysis found that at 3 days post-NeuroD1-mCherry viral injection (3 dpi), 92.1 ± 3.1% of NeuroD1-mCherry infected cells were GFAP-positive, indicating preferential infection of astroglial population guided by GFAP::Cre viruses. The gene discussed is GFAP; the disease is infection.