Drug azacitidine safe for children with relapsed MDS or JMML (Rubio-San-Simón A, et al., 2023) Azacitidine can be safely given to children with myelodysplastic syndrome (MDS) or juvenile myelomonocytic leukemia (JMML) in whom the disease has recurred. Particularly for JMML, it also seems to work well.