6 . avoid close contact with patients of fifth disease 6 .避免与第五病患者近距离接触。
2.
Fifth disease is a mild illness that occurs mostly in children 病徵第五病是一种多见于儿童的轻微疾病。
3.
Fifth disease is caused by parvovirus b19 . this virus infects humans only 第五病是由细小病毒b19引致的疾病，受感染者只限于人类。
4.
Fifth disease is usually a mild illness . no definite treatment is needed . anti - fever drugs may relieve the symptoms 第五病通常属轻微的疾病，不一定需要治疗，服用退烧药物可减轻有关症状。
