Some groups are also given vitamin A, like young children and the severely malnourished, which act as an immunomodulator that boosts the antibody responses to measles and decreases the risk of serious complications.

针对某些幼儿和严重营养不良的患者，也可施用维生素A，以起到免疫调节剂的作用，增强抗体对麻疹的反应，降低严重并发症的风险。