scarlatina haemorrhagica

例句：

1. 1.The patient was diagnosed with scarlatina haemorrhagica, which required immediate treatment.
   这名患者被诊断出患有恶性疟疾，需要立即治疗。
2. 2.Scarlatina haemorrhagica is a serious condition that can be life-threatening if left untreated.
   恶性疟疾是一种严重的疾病，如果不及时治疗可能会危及生命。
3. 3. Doctors are trying to find a cure for scarlatina haemorrhagica, but so far there has been no significant breakthrough.
   医生们正在尝试找到治疗恶性疟疾的方法，但到目前为止还没有取得显著进展。