BCL2 and congenital rubella syndrome: After treatment with NaHS, the TUNEL-positive neurons (Figure 4A) and the level of Bax (Figure 4B) in the hippocampus of CRS-exposed rats were significantly decreased, while the level of Bcl2 in the hippocampus of CRS-exposed rats was significantly increased (Figure 4C), which indicated the protective action of H2S on CRS-induced apoptosis.